49

float x = 100;
float y = 100;
float x2 = 100;
float y2 = 100;
float segLength = 30;

void setup(){
size(200,200);
smooth();
strokeWeight(20.0);
stroke(0,100);
}

void draw(){
background(226);

float dx = mouseX - x;
float dy = mouseY - y;
float angle1 = atan2(dy,dx);

float tx = mouseX - cos(angle1) * segLength;
float ty = mouseY - sin(angle1) * segLength;
dx = tx - x2;
dy = ty -y2;
float angle2 = atan2(dy,dx);
x = x2 + cos(angle2) * segLength;
y = y2 + sin(angle2) * segLength;

segment(x,y,angle1);
segment(x2,y2,angle2);

}

void segment(float x, float y, float a){
pushMatrix();
translate(x,y);
rotate(a);
line(0,0,segLength,0);
popMatrix();
}