User must install PWMServo zip library file from https://osoyoo.com/driver/sg90car/PWMServo.zip

Connection:

IN1 to D12

IN2 to D11
Back Motor to K1

Front Servo to D9

Left Tracking Sensor to D6

Right Tracking Sensor to D7

Software:
https://osoyoo.com/driver/blockcar/blockcar-lesson3/blockcar-lesson3.zip

把车放到黑色track上,车会自动循迹。