hello
I am trying to change the following script so that the tree is re-created everytime the mouse is pressed although im not having much luck. can anyone explain how i can add a mousePressed so that the tree gets randomly re-generated with every mouseclick?

Tree branches;

void setup() {
 size(500,500);
 smooth();
 branches = new Tree (random(10),random(3,5));

}

void draw() {
 background(0);
 stroke(255);

 branches.draw();
}

class Tree
{
int frame =0;  
float theta;
float branch;
float mainbranches;
float a;
float x;
float y;

Tree (float x, float s)// set up two parameters x and s
{
a = x; // this controls the angle of the branches
theta = radians(a);
mainbranches = (height/s);
branch=y;
}

 void branch (float y){
      y=y*0.7;
   if (y > 3) {
     pushMatrix();    
     rotate(a);  
     line(0,0,0,-y);  
     translate(0,-y);
     branch(y);
     popMatrix();  

  pushMatrix();
   rotate(-a+0.6);
   line(0,0,0,-y+2);
  translate(0,-y+2);
   branch(y+0.4);
   popMatrix();
   
   }
 }

 void draw () {

  translate(width/2,height);

   line(0,0,0,-height/2);

   translate(0,-height/2);
    // Start the recursive branching!
   branch(mainbranches);
 

 }
}

Thankyou!!!!!!!!