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The following code was from a rejected suggested edit, by an anonymous user, to the original post. See also Rejected edit results in loss of constructive code modification.

I have reproduced the code here - it may be of some use to someone:

#include "Adafruit_WS2801.h"
#include "SPI.h" // Comment out this line if using Trinket or Gemma
#ifdef __AVR_ATtiny85__
#include <avr/power.h>
#endif
#include <time.h>
#include <stdlib.h>
#define MIN_TIME 150000
#define MAX_TIME 1000000
#define RADIUS 240
#define MAGNETS_NUM 1
uint8_t shwFg = 1;
uint8_t dataPin1 = 2; // White wire on Adafruit Pixels
uint8_t dataPin2 = 3; // Yellow wire on Adafruit Pixels
uint8_t dataPin3 = 4; // Yellow wire on Adafruit Pixels
uint8_t dataPin4 = 5; // Yellow wire on Adafruit Pixels
uint8_t clockPin1 = 10; // White wire on Adafruit Pixels
uint8_t clockPin2 = 11; // Green wire on Adafruit Pixels
uint8_t clockPin3 = 12; // Green wire on Adafruit Pixels
uint8_t clockPin4 = 13; // Green wire on Adafruit Pixels
uint8_t hallPin = 20;
uint8_t pointer1 =0;
uint8_t pointer2 =8;
uint8_t pointer3 =16;
uint8_t pointer4 =24;
int addr = 0;
uint8_t LED1R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED2R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED3R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED4R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED5R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED6R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED7R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED8R[32] = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
uint8_t LED1B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED2B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED3B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED4B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED5B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED6B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED7B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED8B[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
uint8_t LED1G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED2G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED3G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED4G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED5G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED6G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED7G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
uint8_t LED8G[32] = {1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0};
long now = 0;
long prev =0;
int hallState = 0;
unsigned long previous = 0;
unsigned long dlyMic =123456;
Adafruit_WS2801 strip = Adafruit_WS2801((uint16_t)8, dataPin1, clockPin1);
Adafruit_WS2801 strip2 = Adafruit_WS2801((uint16_t)8, dataPin2, clockPin2);
Adafruit_WS2801 strip3 = Adafruit_WS2801((uint16_t)8, dataPin3, clockPin3);
Adafruit_WS2801 strip4 = Adafruit_WS2801((uint16_t)8, dataPin4, clockPin4);
int a = 0;
unsigned long current=0;
unsigned long delta=0;
void GetDelay() {
 previous = current;
 current = micros();
// previous = micros();
}
void setup() {
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000L)
 clock_prescale_set(clock_div_1); // Enable 16 MHz on Trinket
#endif
 pinMode(hallPin, INPUT);
 Serial.begin(115200);
 strip.begin();
 strip2.begin();
 strip3.begin();
 strip4.begin();
 attachInterrupt(3, GetDelay, RISING);
}
void delayMicroseconds2(unsigned int us)
{
 // calling avrlib's delay_us() function with low values (e.g. 1 or
 // 2 microseconds) gives delays longer than desired.
 //delay_us(us);
 // for the 16 MHz clock on most Arduino boards
 // for a one-microsecond delay, simply return. the overhead
 // of the function call yields a delay of approximately 1 1/8 us.
 if (--us == 0)
 return;
 // the following loop takes a quarter of a microsecond (4 cycles)
 // per iteration, so execute it four times for each microsecond of
 // delay requested.
 us <<= 2;
 // account for the time taken in the preceeding commands.
 us -= 2;
 // busy wait
 __asm__ __volatile__ (
 "1: sbiw %0,1" "\n\t" // 2 cycles
 "brne 1b" : "=w" (us) : "0" (us) // 2 cycles
 );
}
void loop() {
 // prev = micros();
 // noInterrupts();
 delta = current - previous;
 if (delta > MAX_TIME) {
 shwFg = 0;
 }else{
 shwFg = 1;
 }
 shwFg = 1;
 delta<<1;
 delta-=650;
 if (shwFg == 0) {
 int i;
 for (i = 0; i < 8; i++){
 strip.setPixelColor(i, 0, 0, 0);
 strip2.setPixelColor(i, 0, 0, 0);
 strip3.setPixelColor(i, 0, 0, 0);
 strip4.setPixelColor(i, 0, 0, 0);
 }
 }
 else {
 strip.setPixelColor(0, LED1R[pointer1] ,(LED1B[pointer1] ) ,(LED1G[pointer1] ) );
 strip2.setPixelColor(0, LED1R[pointer2] ,(LED1B[pointer2] ) ,(LED1G[pointer2] ) );
 strip3.setPixelColor(0, LED1R[pointer3] ,(LED1B[pointer3] ) ,(LED1G[pointer3] ) );
 strip4.setPixelColor(0, LED1R[pointer4] ,(LED1B[pointer4] ) ,(LED1G[pointer4] ) );
 strip.setPixelColor(1, LED2R[pointer1] ,(LED2B[pointer1] ) ,(LED2G[pointer1] ) );
 strip2.setPixelColor(1, LED2R[pointer2] ,(LED2B[pointer2] ) ,(LED2G[pointer2] ) );
 strip3.setPixelColor(1, LED2R[pointer3] ,(LED2B[pointer3] ) ,(LED2G[pointer3] ) );
 strip4.setPixelColor(1, LED2R[pointer4] ,(LED2B[pointer4] ) ,(LED2G[pointer4] ) );
 strip.setPixelColor(2, LED3R[pointer1] ,(LED3B[pointer1] ) ,(LED3G[pointer1] ) );
 strip2.setPixelColor(2, LED3R[pointer2] ,(LED3B[pointer2] ) ,(LED3G[pointer2] ) );
 strip3.setPixelColor(2, LED3R[pointer3] ,(LED3B[pointer3] ) ,(LED3G[pointer3] ) );
 strip4.setPixelColor(2, LED3R[pointer4] ,(LED3B[pointer4] ) ,(LED3G[pointer4] ) );
 strip.setPixelColor(3, LED4R[pointer1] ,(LED4B[pointer1] ) ,(LED4G[pointer1] ) );
 strip2.setPixelColor(3, LED4R[pointer2] ,(LED4B[pointer2] ) ,(LED4G[pointer2] ) );
 strip3.setPixelColor(3, LED4R[pointer3] ,(LED4B[pointer3] ) ,(LED4G[pointer3] ) );
 strip4.setPixelColor(3, LED4R[pointer4] ,(LED4B[pointer4] ) ,(LED4G[pointer4] ) );
 strip.setPixelColor(4, LED5R[pointer1] ,(LED5B[pointer1] ) ,(LED5G[pointer1] ) );
 strip2.setPixelColor(4, LED5R[pointer2] ,(LED5B[pointer2] ) ,(LED5G[pointer2] ) );
 strip3.setPixelColor(4, LED5R[pointer3] ,(LED5B[pointer3] ) ,(LED5G[pointer3] ) );
 strip4.setPixelColor(4, LED5R[pointer4] ,(LED5B[pointer4] ) ,(LED5G[pointer4] ) );
 strip.setPixelColor(5, LED6R[pointer1] ,(LED6B[pointer1] ) ,(LED6G[pointer1] ) );
 strip2.setPixelColor(5, LED6R[pointer2] ,(LED6B[pointer2] ) ,(LED6G[pointer2] ) );
 strip3.setPixelColor(5, LED6R[pointer3] ,(LED6B[pointer3] ) ,(LED6G[pointer3] ) );
 strip4.setPixelColor(5, LED6R[pointer4] ,(LED6B[pointer4] ) ,(LED6G[pointer4] ) );
 strip.setPixelColor(6, LED7R[pointer1] ,(LED7B[pointer1] ) ,(LED7G[pointer1] ) );
 strip2.setPixelColor(6, LED7R[pointer2] ,(LED7B[pointer2] ) ,(LED7G[pointer2] ) );
 strip3.setPixelColor(6, LED7R[pointer3] ,(LED7B[pointer3] ) ,(LED7G[pointer3] ) );
 strip4.setPixelColor(6, LED7R[pointer4] ,(LED7B[pointer4] ) ,(LED7G[pointer4] ) );
 strip.setPixelColor(7, LED8R[pointer1] ,(LED8B[pointer1] ) ,(LED8G[pointer1] ) );
 strip2.setPixelColor(7, LED8R[pointer2] ,(LED8B[pointer2] ) ,(LED8G[pointer2] ) );
 strip3.setPixelColor(7, LED8R[pointer3] ,(LED8B[pointer3] ) ,(LED8G[pointer3] ) );
 strip4.setPixelColor(7, LED8R[pointer4] ,(LED8B[pointer4] ) ,(LED8G[pointer4] ) );
 }
 strip.show();
 strip2.show();
 strip3.show();
 strip4.show();
 //delay(10);
 pointer1++;
 pointer1&=31;
 pointer3++;
 pointer3&=31;
 pointer2++;
 pointer2&=31;
 pointer4++;
 pointer4&=31;
 // interrupts();
 // now =micros();
 delayMicroseconds2(delta);
 //Serial.println(now - prev);
}