Hi guys, i'm new in programing and doing a school project, so i want to create an interface where the user clicks the button with an image then the image displays in the background. the code is as follows

color currentcolor;

RectButton rect1, rect2, rect3;
RectButton rect4, rect5, rect6;
RectButton rect7, rect8, rect9;

PImage a;
PImage b;
PImage c;
PImage d;
PImage e;

boolean locked = false;

void setup()
{
 size(400, 400);
 smooth();


 color baseColor = color(102);
 currentcolor = baseColor;

a = loadImage("carling_black_label.jpeg");
b = loadImage("johnny_Walker.jpeg");
c = loadImage("Dark_and_lovelly_kids.jpeg");
d = loadImage("Chivas_Regal_18yrs.gif");
e = loadImage("J_&_B.jpeg");

 // Define and create rectangle button
 color buttoncolor = color(224);
 color highlight = color(153);
 rectMode(CENTER);
 rect1 = new RectButton(10, 20, 10, buttoncolor, a);

 // Define and create rectangle button
 buttoncolor = color(204);
 highlight = color(153);
 rect2 = new RectButton(50, 20, 10, buttoncolor, highlight);

 // Define and create circle button
 buttoncolor = color(173);
 highlight = color(102);
 rect3 = new RectButton(90, 20, 10, buttoncolor, highlight);

 // Define and create rectangle button
 buttoncolor = color(152);
 highlight = color(51);
 rect4 = new RectButton(130, 20, 10, buttoncolor, highlight);

 // Define and create rectangle button
 buttoncolor = color(110);
 highlight = color(0);
 rect5 = new RectButton(170, 20, 10, buttoncolor, highlight);
 
 // Define and create rectangle button
 buttoncolor = color(100);
 highlight = color(0);
 rect6 = new RectButton(210, 20, 10, buttoncolor, highlight);
 
 // Define and create rectangle button
 buttoncolor = color(95);
 highlight = color(0);
 rect7 = new RectButton(250, 20, 10, buttoncolor, highlight);
 
 // Define and create rectangle button
 buttoncolor = color(70);
 highlight = color(0);
 rect8 = new RectButton(290, 20, 10, buttoncolor, highlight);
 
 // Define and create rectangle button
 buttoncolor = color(50);
 highlight = color(0);
 rect9 = new RectButton(340, 20, 10, buttoncolor, highlight);
}

void draw()
{
 background(currentcolor);
 stroke(255);
 update(mouseX, mouseY);
 rect1.display();
 rect2.display();
 rect3.display();
 rect4.display();
 rect5.display();
 rect6.display();
 rect7.display();
 rect8.display();
 rect9.display();
}

void update(int x, int y)
{
 if(locked == false) {
   rect1.update();
   rect2.update();
   rect3.update();
   rect4.update();
   rect5.update();
   rect6.update();
   rect7.update();
   rect8.update();
   rect9.update();
   
 }
 else {
   locked = false;
 }

 if(mousePressed) {
   if(rect1.pressed()) {
     currentcolor = rect1.basecolor;
   }
   else if(rect2.pressed()) {
     currentcolor = rect2.basecolor;
   }
   else if(rect3.pressed()) {
     currentcolor = rect3.basecolor;
   }
   else if(rect4.pressed()) {
     currentcolor = rect4.basecolor;
   }
   else if(rect5.pressed()) {
     currentcolor = rect5.basecolor;
   }
   else if(rect6.pressed()) {
     currentcolor = rect6.basecolor;
   }
   else if(rect7.pressed()) {
     currentcolor = rect7.basecolor;
   }
   else if(rect8.pressed()) {
     currentcolor = rect8.basecolor;
   }
   else if(rect9.pressed()) {
     currentcolor = rect9.basecolor;
   }
 }
}


class Button
{
 int x, y;
 int size;
 color basecolor, highlightcolor;
 color currentcolor;
 boolean over = false;
 boolean pressed = false;  

 void update()
 {
   if(over()) {
     currentcolor = highlightcolor;
   }
   else {
     currentcolor = basecolor;
   }
 }

 boolean pressed()
 {
   if(over) {
     locked = true;
     return true;
   }
   else {
     locked = false;
     return false;
   }    
 }

 boolean over()
 {
   return true;
 }

 boolean overRect(int x, int y, int width, int height)
 {
   if (mouseX >= x && mouseX <= x+width &&
     mouseY >= y && mouseY <= y+height) {
     return true;
   }
   else {
     return false;
   }
 }

 boolean overRect(int x, int y, int diameter)
 {
   float disX = x - mouseX;
   float disY = y - mouseY;
   if(sqrt(sq(disX) + sq(disY)) < diameter/2 ) {
     return true;
   }
   else {
     return false;
   }
 }

}


class RectButton1 extends Button
{
 RectButton1(int ix, int iy, int isize, color icolor, color ihighlight)
 {
   x = ix;
   y = iy;
   size = isize;
   basecolor = icolor;
   highlightcolor = ihighlight;
   currentcolor = basecolor;
 }

 boolean over()
 {
   if( overRect(x, y, size) ) {
     over = true;
     return true;
   }
   else {
     over = false;
     return false;
   }
 }

 void display()
 {
   stroke(255);
   fill(currentcolor);
   rect(x, y, size, size);
 }
}


class RectButton extends Button
{
 RectButton(int ix, int iy, int isize, color icolor, color ihighlight)
 {
   x = ix;
   y = iy;
   size = isize;
   basecolor = icolor;
   highlightcolor = ihighlight;
   currentcolor = basecolor;
 }

 boolean over()
 {
   if( overRect(x, y, size) ) {
     over = true;
     return true;
   }
   else {
     over = false;
     return false;
   }
 }

 void display()
 {
   stroke(255);
   fill(currentcolor);
   rect(x, y, size, size);
 }
}



Someone please help

Hey Philho... very much apologize for appearing rude (not replying), but the project is coming very well though. I'm on the final stages.

But thanx for replying...very much appreciated.http:)