In Add a Light you built a second LED and wrote scripts to control both of them.  In Intro to Lists, you got to see how to create and access lists.  In this activity, you will add a third LED, and then use lists to set up custom LED on/off sequences.  You will even use a list of LED pins and a list of on times in the same for loop to fully customize the light sequence.

Parts

(1) Setup from Add a Light
(1) LED - Red
(1) Resistor - 220 Ω (red-red-brown-gold)
(1) Jumper wire (black)

Circuit

• Disconnect USB.
• Connect a red LED to P15.  Build it above the yellow and green LEDs so that it looks like a stop light (red above yellow above green).
• Reconnect USB.