Mouse Down / Mouse Up. Every time you press a button on the mouse, it first goes down when pressed and then comes up when released. These two states are corresponding to the Mouse Down and Mouse Up ...

Step #1 - Is the mouse pressed? Buttons often change color when they're pressed, so that the user realizes they've pressed something. In this challenge, you'll change the code so that this button ...

Step #1 - Is the mouse pressed? Buttons often change color when they're pressed, so that the user realizes they've pressed something. In this challenge, you'll change the code so that this button ...