We don't know why this isn't working, we have tried everything we can think of, from capital letters to semi-colons!

Help would be much appreciated!.

 

int tangX;
int tangY;
int tangsize = 100;
PImage normaldog, happydog, tang;

void setup() {
size (650, 650);
background (255);
tangX = width/2;
tangY = height/2;


normaldog = loadImage ("shihtzu1.jpg");
happydog = loadImage ("shihtzu2.jpg");
tang = loadImage ("tang.jpg");
noLoop();

}

void draw() {
image(normaldog, 400,400, normaldog.width/2, normaldog.height/2);
image (tang,10, 10);
}

void mouseClicked() {
if(mouseX > 10 && mouseX < 200 &&
mouseY > 10 && mouseY < 200){
image(happydog, 400, 400, happydog.width/2, happydog.height/2);

void mouseDragged () {
if((mouseX > (tangX - tangsize/2))&&
(mouseX < tangX + tangsize/2))&&
(mouseY > (tangY - tangsize/2))&&
(mouseY < (tangY + tangsize/2))){
tangX = mouseX;
tangY = mouseY;

normaldog = happydog;

}

 

}