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Mini-challenge solutions

Program Review: Line Track for Distance

Hover on any block in the program to view a detailed explanation.
1_RepeatUntil_Block Conditionally sends the program flow back to the start. Lets the flow out of the loop if the left motor value is greater than 1440 at the beginning of the loop. Robot repeats movements inside the loop until the left motor has traveled 4 rotations at the exact moment the loop starts.
2_LineTrackLeft_ Chooses whether to turn the motors on for left turn or right turn, using grayscale of 75. Tracks the left side of the line by alternating left and right motor between 50% and 0% power. Robot makes an instantanous decision to turn left or right. By making this decision repeatedly, the robot tracks the left side of the line.