Im trying to create a new sensor and set the data. Unfortunatly I cant figure it out and cant find any examples.

Here is the code of what I want to achieve:
(sensor.mysensor doesnt exists yet)

import requests
import json
import time
def update_sensor():
 # scraping website and filling data
 data = "dummy content"
 state.setattr("sensor.mysensor", data)
while True:
 time.sleep(600)
 update_sensor()

This is only one of many different tries.

Could someone please help me?