kaleidoscope draw sketch

gistfile1.txt

SYMMETRY = 7

def setup():
    size(720,720,P2D)
    background(0)
        
def keyPressed():
    global SYMMETRY
    if key == 's':
        saveFrame("/Users/steven/tmp/screen.png")
        print("Saved!")
    if key == 'x':
        background(0)
    if key == '3':
        SYMMETRY = 3
    if key == '4':
        SYMMETRY = 4
    if key == '5':
        SYMMETRY = 5
    if key == '6':
        SYMMETRY = 6
    if key == '7':
        SYMMETRY = 7
    if key == '8':
        SYMMETRY = 8
    if key == '9':
        SYMMETRY = 9
        
def draw():
    global SYMMETRY
    dangle = (2.0*PI)/float(SYMMETRY)
    if (mousePressed):
        fill(255)
        noStroke()
        dx = mouseX-(width/2.0)
        dy = mouseY-(height/2.0)
        r = sqrt((dx*dx)+(dy*dy))
        fill(255-(r/2),0,r/2)
        ang = atan2(dy,dx)
        for x in range(0, int(SYMMETRY)):
            ang2 = ang+(x*dangle)
            x2 = width/2.0 + (r*cos(ang2))
            y2 = height/2.0 + (r*sin(ang2))
            ellipse(x2,y2,11,11)