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# P3Dだと干渉縞な感じ
W=540;S,C=1,40;t=0
def setup():size(W,W,P3D);stroke(255);noFill()
def draw():global t;clear();translate(W/2,W/2);F(500);t+=.1
def F(i):circle(S*sin(t+i/C),S*cos(t+i/C),i);return 0 if i<1 else F(i*.99)
#つぶやきProcessingpic.twitter.com/cdh7vU9Ibc
W=540;S,C=5,20;t=0
def setup():size(W,W,P3D);stroke(255);noFill()
def draw():global t;clear();translate(W/2,W/2);F(500);t+=.1
def F(i):circle(S*sin(t+i/C),S*cos(t+i/C),i);return 0 if i<1 else F(i*.99)
#つぶやきProcessingpic.twitter.com/6ST1zK4zWs
Hallucinating 
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