def setup
@x = 50
@y = 50
fill(255, 0, 0)
end
def draw
@x -= 5 if keyIsDown(LEFT_ARROW)
@x += 5 if keyIsDown(RIGHT_ARROW)
@y -= 5 if keyIsDown(UP_ARROW)
@y += 5 if keyIsDown(DOWN_ARROW)
background(220)
ellipse(@x, @y, 30, 30)
end
def setup
@diameter = 30
end
def draw
# 107 and 187 are keyCodes for "+"
if keyIsDown(107) || keyIsDown(187)
@diameter += 1
end
# 109 and 189 are keyCodes for "-"
if keyIsDown(109) || keyIsDown(189)
@diameter -= 1
end
background(220)
fill(255, 0, 0)
ellipse(50, 50, @diameter, @diameter)
end