void setup (){
  background(255);
  size(400,300);
  frameRate(20);
}
float theta=0;
float a=radians(57.1);
int ang=0;
float x=100*cos (theta);
float y=40*sin (theta);
float phi=atan2(140-y,140-x);
float leng=sqrt(sq(140-y)+sq(140-x));
float leng1=142.5;
void draw (){
  fill(255);
  rect(0,0,400,300);
  fill(0);
  noFill();
  x=100*cos (theta);  
  y=40*sin (theta);
  phi=atan2(160-y,130-x);
  leng=sqrt(sq(160-y)+sq(130-x));  
 
  ellipse(150,230,200,80);
  line(176.5,230,176.5+250*cos(a),230-250*sin(a));
  line(295,46.8,260,210);
  line(295,46.9,330,250);
  pushMatrix();
  translate(280,70);
  rotate(PI-phi);
  line(leng,0,leng-leng1,0);
  line(0,2,leng1,2);
  line(0,-2,leng1,-2);
  
  popMatrix();
  ang=(ang+5)%360;
  theta=radians(ang);

}