Leo sees a long queue of people. They're waiting at the ticket window. 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 is your challenge: create the program that switches on the light when Leo shows his yellow ticket to the Colour Sensor.

Create the program. It switches on the light when Leo shows his yellow ticket to the Colour Sensor.

Test your program. Put Leo’s yellow ticket in front of the Colour Sensor.

Program the Fast Lane to react to the yellow ticket differently.

Upgrade the Fast Lane for Leo.