float x1 = 0;
float y1 = 0;
int r = 200;
float theta1 = 0.0;
float theta2 = 0.0;
int angle;
int xspacing1 = 16;
int xspacing2 = 16;
float dx1;
float dx2;
float period1 = 500.0;
float period2 = 500.0;

float x2 = 0;
float y2 = 0;


void setup(){
  size(1136,640);
  background(0);
  stroke(255);
  dx1 = (TWO_PI/ period1) * xspacing1;
  dx2 = (TWO_PI/ period2) * xspacing2;
}

void draw(){
  background(0);
  theta1 += 0.02;
  theta2 += 0.021;
//  line(0,320,1160,320);
  float x1 = theta1;
  float x2 = theta2;
  for(angle=0;angle<720;angle+=10){
    x1 = (angle)/180* PI;
    x2 = (angle)/180* PI;
    y1 = -1*r*sin(x1+theta1);  
    y2 = -1*r*sin(x2+theta2);
    ellipse(x1*100,y1+320,10,10);
    ellipse(x2*110,y2+320,10,10);
 
    point(x1*100,320,x1*100,320);
    x1+=dx1;
    x2+=dx2;
  }
}