# Click within the image to change # the value of the rectangle value = 0 def draw(): fill(value) rect(25, 25, 50, 50) def mousePressed(): global value if value == 0: value = 255 else: value = 0
THIS EXAMPLE IS BROKEN
The mousePressed() function is called once after every time a mouse button is pressed. The mouseButton variable (see the related reference entry) can be used to determine which button has been pressed.
Mouse and keyboard events only work when a program has draw(). Without draw(), the code is only run once and then stops listening for events.