Source for the code and wiring diagram is:
Rick_Fundus https://www.hackster.io/Rick_Findus/arduino-sunflower-c4fd84
The photo-resistors react to the the bright light and power the servo-motor, turning it clockwise or counter-clockwise depending on which resistor is exposed to more light.
Hey man, this is lovely and useful! Great job.
What a great project !!! perfect !! your grade is 100