Test your Response time!
Click on the "Start" button first, and wait until the background color changes.
As soon as the background changes, hit the "stop!" button.
Select a different background color:
deeppink
aliceblue
crimson
darkkhaki
cadetblue
darkorchid
coral
chocolate
mediumslateblue
tomato
darkslategray
limegreen
cornflowerblue
darkolivegreen
