This is adapted from Daniel Rozin’s paint lines. Randon_Lines.

I make some changes to several lines and it finally looks like this.
Google search thinks my work looks like this picture, and this picture is in the catogory of visual art. What a relief, it looks like art.

// The world pixel by pixel 2020
// Daniel Rozin, adapted by jiaolyulu
// paint lines

void setup() {
  size(1000, 800);
}

void draw() {
  fill(255,100);
  rect(0, 0, width, height);
  for (int i = 0; i< 100; i+=1) {
    //from this line I made several changes.
    for (float j=29;j>1.5;j-=0.5){  
    float thisX= ((mouseX+1000) /3+ 200*sin((float(i)+0.54*j)/100*3.14+4.34)-500)*(j%5)+500;
    float thisY= ((mouseY +800)/3+ 200*cos((float(i)+0.63*j)/100*3.14+4.34)-400)*(j%5)+400;
    strokeWeight(j%4*((i+millis()*0.001)%2+1));
    stroke (245-25*j*(j%2)+50*sin((float(i)+millis()*0.01)/100*6.283), 275-15*j+20*cos((float(i)+millis()*0.01)/100*6.283), 205-15*j+10*cos((float(i)+millis()*0.1)/100*6.28));
    line(thisX, thisY, 500+20*(j%8-4.)+(j%5-2.5)*200,400+20*(j%8-4.)+(j%5-2.5)*(j%2-0.5)*600);
    
    }
   
  }
  
}