Typo 2 - OpenProcessing

sketch267710
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void setup()
{size(500, 500);
​
}
void draw()
{
  background(255);
  
 translate(0,0);
 float x= millis()/1000.0;
 fill(0);
​
 
  for(int i=0; i<1; i=10)
 
   {
​
fill(0);
  rect (0, 0, 50, x*200);
  rect (100, 0, 50, x*200);
  rect (200, 0, 50, x*200);
  rect (300, 0, 50, x*200);
  rect (400, 0, 50, x*200);
  rect (500, 0, 50, x*200);
   }
   pushMatrix();
   translate(0, 300);
       for (float a=0; a<500; a+=100)
    {
      for (float b=0; b<500; b+=100)
      {
        noStroke();
        fill(255);
        rect(a, 0, 50, 50);}
    }
    popMatrix();
    
    pushMatrix();
 translate(0, 450);
       for (float c=0; c<500; c+=100)
    {
      for (float d=0; d<500; d+=100)
      {
        noStroke();
        fill(255);
        rect(c, 0, 50, 50);}
    }
​
popMatrix();
​
pushMatrix();
   translate(50, 150);
       for (float a=0; a<500; a+=100)
    {
      for (float b=0; b<500; b+=100)
      {
        noStroke();
        fill(0);
        rect(a, 0, 50, 50);}
    }
    popMatrix();
    
    pushMatrix();
 translate(50, 0);
       for (float c=0; c<500; c+=100)
    {
      for (float d=0; d<500; d+=100)
      {
        noStroke();
        fill(0);
        rect(c, 0, 50, 50);}
    }
​
popMatrix();
}