93

float theta;

void setup(){
size(640,360);
smooth();
}


void draw(){
background(0);
frameRate(30);
stroke(255);
float a = (mouseX/(float)width) *90f;
theta = radians(a);
translate(width/2,height);
line(0,0,0,-120);
translate(0,-120);
branch(120);
}

void branch(float h){
h *= 0.66;

if(h>2){
pushMatrix();
rotate(theta);
line(0,0,0,-h);
translate(0,-h);
branch(h);
popMatrix();

pushMatrix();
rotate(-theta);
line(0,0,0,-h);
translate(0,-h);
branch(h);
popMatrix();
}
}

void mousePressed(){
save("93.jpg");
}