// added lines to all the brush statements, then reversed code to have each colour coming from different direction
  
  //variables - drawing, then making the brush bigger if shift plus colour key
  
  //declaring variables
  float brushstroke;
  float bigBrushstroke;
  int r = 255;
  int g = 255;
  int b = 255;
  int a = 80;
  
  
  void brush() {
  
    if (mousePressed == true) {
      cursor(CROSS);
      stroke(random(0,155));
      strokeWeight(brushstroke *.1);
      line(pmouseX ,pmouseY ,constrain(mouseX, 0 , 0) , constrain(mouseY, 0, height)); 
    }
  
    else {
      cursor(HAND);
    }
  
  
    //bring in the Red Colour when R or r is pressed
    if (keyPressed){
      if (key == 'r') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(r,0,0,a);
        strokeWeight(10);
        strokeWeight(brushstroke *.1);
        line(pmouseX ,pmouseY ,constrain(mouseX, width , width) , constrain(mouseY, 0, height)); 
      }
  
    } //end red
  
  
    //bring in the BIG Red Stroke when SHIFT R or r is pressed
    if (keyPressed){
      if (key == 'R') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(r,0,0,a);
        strokeWeight(brushstroke *.4);
        line(pmouseX ,pmouseY ,constrain(mouseX, width , width) , constrain(mouseY, 0, height)); 
      }
  
    } //end BIG red
  
  
  
    //bring in the Green Colour when G or g is pressed
    if (keyPressed){
      if (key == 'g') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(0,g,0,a);
        strokeWeight(brushstroke *.1);
        line(pmouseX ,pmouseY ,constrain(mouseX, 0 , width) , constrain(mouseY, 0, 0)); 
      }
  
    }// end green
  
  
    //bring in the BIG Green Stroke when SHIFT G or r is pressed
    if (keyPressed){
      if (key == 'G') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(0,g,0,a);
        strokeWeight(brushstroke *.4);
        line(pmouseX ,pmouseY ,constrain(mouseX, 0 , width) , constrain(mouseY, 0, 0)); 
      }
  
    } //end BIG Green
  
  
    //bring in the Blue Colour when B or b is pressed
    if (keyPressed){
      if (key == 'b') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(0,0,b,a);
        strokeWeight(brushstroke *.1);
        line(pmouseX ,pmouseY ,constrain(mouseX, 0, height) , constrain(mouseY, height, width));
      }
  
    }// end blue
  
  
    //bring in the BIG Blue Stroke when SHIFT B or r is pressed
    if (keyPressed){
      if (key == 'B') {
        cursor(CROSS);
        colorMode(RGB);
        stroke(0,0,b,a);
        strokeWeight(brushstroke *.4);
        line(pmouseX ,pmouseY ,constrain(mouseX, 0, height) , constrain(mouseY, height, width));
      }
  
    } //end BIG Blue
  
  
  
  } //end brush()