如何在使用python的处理中使keypress函数重复

每次按r键我都想让他的脸变红

def setup():
    fill(0,0,255)
    size(400,400)
    ellipse(200,200,200,200)#body
    fill(255)
    ellipse(150,125,75,75)#eyes
    ellipse(250,125,75,75)
    fill(0)
    ellipse(137,115,33,33)#inside eyes
    ellipse(240,133,33,33)
    ellipse(200,230,180,80)

def draw():
    return



def keyPressed():
    if key == "r":
        fill(1*25,0,255)
        size(400,400)
        ellipse(200,200,200,200)#head
        fill(255)
        ellipse(150,125,75,75)#eyes
        ellipse(250,125,75,75)
        fill(0)
        ellipse(137,115,33,33)#inside eyes
        ellipse(240,133,33,33)
        ellipse(200,230,180,80)

我希望每次按r键时脸上的填充物都会改变25