Some nice shape from the inequality: tan(x)*tan(y) > sin(x*y)

tanX_tanY_gt_sinXY.pde

//remix https://www.dwitter.net/d/23922
float t;
void setup() {
  size(1280, 720);
  noStroke(); 
  fill(-1);
  clear();
}
void draw() {
  translate(width/2, height/2);
  t+=1;
  float A=.03;
  for (int X=480, Y=(0|50*(int)t)%539-270;X>=-480;--X) {
    if (tan(A*X)*tan(A*Y)>sin(A*A*X*Y)) rect(X,Y,1,1);
  }
  //saveFrame("frame_######.png");
}