The photoresistor or LDR is a resistor that varies its value according to the light falling on it and therefore it can be used with Arduino to create innovative and more complex projects.
Connect the LED and LDR to Arduino as shown on the image.
List of components:
|U1||1||Arduino Uno R3|
|R1||1||1 kΩ Resistor|
|R2||1||220 Ω Resistor|