float weight=1;
char lastShape;
int x=2;
float w=random(0,4);
int c=0;
char one;
char two;
float rand;

char pShape;

void setup() {
  size(400, 600);
  background(255);
  stroke(0);
  strokeWeight(1);
}

//w=random(50,100);

void draw() {
  if(mousePressed){
    
    
    
    if(mouseButton == RIGHT){
      rand=random(0,3);
      
      //generate random color
      if(rand>=0 && rand<1){
        stroke(255,0,0);
      }else if(rand>=1 && rand<2){
        stroke(0,255,0);
      }else{
        stroke(0,0,255);
      }
      
      //generate random shape
      if(w>=0 && w<1){
        drawShape2('1');
      }else if(w>=1 && w<2){
        drawShape2('2');
      }else if(w>=2 && w<3){
        drawShape2('3');
      }else{
        drawShape2('4');
      }

       //w=random(50,100);//generate random size for shapes
      

    }else if(mouseButton == LEFT){
      if(key == 'r' || key == 'g' || key == 'b' || key == '0'){
        one = lastShape;}
      else{
        one = key;}
      if(key == '+'){
        weight+=1;
        strokeWeight(weight); //changes the drawing object size
        key = lastShape;
      }else if(key == '-'){
        weight-=1;
        if(weight<0){
          weight = 0;
        }
        strokeWeight(weight); //changes the drawing object size
        key = lastShape;
      }else{
        drawShape(one);
      }
    }
    
  }
}

void drawShape(char key1){
  
  if(c == 0){
    line(pmouseX, pmouseY, mouseX, mouseY); //draw line
    lastShape = '4';
  }
  if (key1 == '1'){
    rect(mouseX,mouseY,40+w,25+w); //draw rectange
    lastShape = '1';
    c+=1;
  }else if(key1 == '2'){
    ellipse(mouseX, mouseY, 40+w, 40+w); //draw elipse
    lastShape = '2';
    c+=1;
  }else if(key1 == '3'){
    arc(mouseX, (mouseY+70), 140, 140, PI, TWO_PI); //draw arc
    lastShape = '3';
    c+=1;
  }else if(key1 == '4'){
    line(pmouseX, pmouseY, mouseX, mouseY); //draw line
    lastShape = '4';
  }
}

void drawShape2(char key1){
  
  if (key1 == '1'){
    rect(mouseX,mouseY,40+w,25+w); //draw rectange
  }else if(key1 == '2'){
    ellipse(mouseX, mouseY, 40+w, 40+w); //draw elipse
  }else if(key1 == '3'){
    arc(mouseX, (mouseY+70), 140, 140, PI, TWO_PI); //draw arc
  }else if(key1 == '4'){
    line(pmouseX, pmouseY, mouseX, mouseY); //draw line
  }
}




void keyPressed() {
  if (key == '0') {
    background(255); //clear canvas
    stroke(0);
    //drawShape(lastShape);
  } else if (key == 'r') {
    stroke(255,0,0);//color red
    //drawShape(lastShape);
  } else if (key == 'g') {
    stroke(0,255,0);//color green
    //drawShape(lastShape);
  } else if (key == 'b') {
    stroke(0,0,255);//color blue
    //drawShape(lastShape);
  } 
}


void mouseReleased(){
  if (mouseButton==RIGHT){
    w=random(0,4);
    stroke(0,0,0);
  }

}