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# Abreviated version from https://github.com/villares
#トゥートProcessing #py5

from collections import deque
history = deque(maxlen=512)

def setup():
size(600, 400)
no_stroke()
color_mode(HSB)

def draw():
background(51)
for i, (x, y) in enumerate(history):
fill(i / 2, 255, 255, 128)
circle(x, y, 8 + i / 16)
if history:
history.append(history.popleft())

def mouse_dragged():
history.append((mouse_x, mouse_y))

def key_pressed():
history.clear()