4. Write an Arduino program that detects a reflective surface using the line sensor array. (see https://www.pololu.com/docs/0J19/3)

a. Must include a function that when called returns

i. 0 (line to the left of the robot)

ii. 1 (line under the robot on the left side)

iii. 2 (line under the robot on the right side)

iiii. 3 (line to the right of the robot)

b. Output the result to the serial port in 0.5second intervals