Leo sees a long line of people. They're waiting at the ticket booth. They need to buy their tickets.
Leo doesn't have to wait. He already has a ticket. He can use the Fast Lane.
Build the Fast Lane for Leo to use.
Here's your challenge: create the program that turns on the light when Leo shows his yellow ticket to the Color Sensor.
Create the program. It turns on the light when Leo shows his yellow ticket to the Color Sensor.
Test your program. Put Leo’s yellow ticket in front of the Color Sensor.
Program the Fast Lane to react to the yellow ticket in a different way.
Upgrade the Fast Lane for Leo.