Change LEDs Between LEDs Using OneShield

when you press on a key green led turn on

and when you press to another

key red led turn on and other will be off

and so on

*one-Shield

you can buy from this web

http://1sheeld.com/

get LEDs different colors

RED

GREEN

YELLOW

WHITE

jumper wires

connect LEDs with

Pins 8, 9, 10, 11 in arduino

connect LEDs as shown

install one-shield App from Store and connect to Board

for more info go to

link: http://1sheeld.com/tutorials/getting-started/

upload code on board Choose Keypad

When you press button A yellow LED will on

When you press button B green LED will on

When you press button C White LED will on

When you press button D Red LED will on

go to code here >>>

code of project