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Added about random numbers

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`@@ -18,9 +18,34 @@ To write a function in Python, you start the function out with the "def" keyword`
`18`	`18`	`### Example`
`19`	`19`
`20`	`20`	```python
`21`		`-def`
	`21`	`+def myFunction (param1, param2, param3):`
	`22`	`+ sum = param1 + param2 + param3`
	`23`	`+ return sum`
`22`	`24`	```
`23`	`25`
	`26`	`+## Random Number`
	`27`	`+`
	`28`	`+Random nubmers can be used to do countdowns or other things that are needed.`
	`29`	`+To get a random number, you have to import the randomint class from the random library`
	`30`	`+by adding`
	`31`	`+`
	`32`	+```
	`33`	`+from random import randint`
	`34`	+```
	`35`	`+`
	`36`	`+to the top of your Python script.`
	`37`	`+`
	`38`	`+Then you can set the random integer to a variable by doing`
	`39`	`+`
	`40`	+```
	`41`	`+myNumber = randint(5,60)`
	`42`	+```
	`43`	`+`
	`44`	`+In the example above, 5 is the lower limit of the range and 60 is the upper limit`
	`45`	`+of the range. If your range needs to be different, then changes either or both of`
	`46`	`+these values.`
	`47`	`+`
	`48`	`+`
`24`	`49`	`## More Resources`
`25`	`50`
`26`	`51`	`The Raspberry Pi traffic light project is written in Python code. You can review the`

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