void setup(){
  size(400,900);
  background(255);
}
float angle=0;
void drawDNA(float a,float b,float y){
  stroke(0);
  fill(0);
  rect(a,y-3,b-a,5);
  stroke(67, 133, 239);
  fill(67, 133, 239);
  ellipse(a,y,20,20);
  stroke(#fc2f2f);
  fill(#fc2f2f);
  ellipse(b,y,20,20);
}
int fromScreen=190;
int multiFact=70;
float anglePlus = 0.04;
int iDiv = 5;
int distanceFromBars = 17;
void draw() {
  background(255);
  for(float i=0;i<80;i++)
  drawDNA(fromScreen+sin(angle+i/iDiv)*multiFact,fromScreen+0-sin(angle+i/iDiv)*multiFact,distanceFromBars*i);
  angle+=anglePlus;
}