苓

int n = 300;

float delta;

float factor;

​

​

void setup(){

size(700,700);

delta = 2*PI/n;

frameRate(15);

}

let factor = 2;

void draw(){

//factor = 32*mouseX/width;

//factor = 1; 

background(50);

translate(width/2, height/2);

stroke(30);

strokeWeight(3);

noFill();

ellipse(10,10,800,800);

stroke(250,300,260*abs(sin(factor*PI/360)));

strokeWeight(5);

for(int i = 0; i < n; i ++){

   point(300*cos(i*delta), 300*sin(i*delta));

   strokeWeight(1);

   line(300*cos(i*delta), 300*sin(i*delta), 300*cos(factor*i*delta), 300*sin(factor*i*delta));

  }

​

factor = factor + 13;

}