hey guys im very new to processing and i have an assignment to make. it's basically a little animated show using mouseX to "animate" it. as the mouse moves across the window and is positioned in a specific place, a new picture is supposed to show up. i did that for the first part of my animation and it was fine. however, i now want to show another animation as the mouse moves backwards...how would i do that??? my prof. said something about using a Boolean, but i dont know...heres what i have so far:
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PImage e1;
PImage e2;
PImage e3;
PImage e4;
PImage e5;
PImage e6;
PImage e7;
PImage e8;
PImage e9;
PImage e10;
PImage e11;
PImage e12;
PImage e13;
PImage e14;
PFont myFont;

void setup() {  
size(600,400);
background(255);
frameRate(100);
myFont=loadFont("STXihei-48.vlw");
textFont(myFont);
e1= loadImage("egg1.png");
e2= loadImage("egg2.png");
e3= loadImage("egg3.png");
e4= loadImage("egg4.png");
e5= loadImage("egg5.png");
e6= loadImage("egg6.png");
e7= loadImage("egg7.png");
e8= loadImage("egg8.png");
e9= loadImage("egg9.png");
e10= loadImage("egg10.png");
e11= loadImage("egg11.png");
e12= loadImage("egg12.png");
e13= loadImage("egg13.png");
e14= loadImage("egg14.png");
}

void draw() {
float normX = norm(mouseX,0,width);
 int which = int(lerp(0,14,normX));
 println(which);
 
if (which==0) {
 background(255);
 image(e1,width/4.7,height/16,300,375);

}else if (which==1) {
 background(255);
image(e2,width/5,height/16,350,375);

}else if (which==2) {
 background(255);
image(e3,width/4,45,280,350);

}else if (which==3) {
 background(255);
image(e4,width/4,45,280,350);

}else if (which==4) {
 background(255);
 image(e5,width/5,54,280,350);
 
}else if (which==5) {
 background(255);
image(e6,width/3.7,50,280,350);

}else if (which==6) {
 background(255);
image(e7,width/4,50,280,350);

}else if (which==7) {
 background(255);
image(e8,width/3.7,50,280,350);

}else if (which==8) {
 background(255);
image(e9,width/4,45,325,360);

}else if (which==9) {
 background(255);
image(e10,width/3.7,42,285,360);

}else if (which==10) {
 background(255);
image(e11,width/3.7,42,285,360);
 
}else if (which==11) {
 background(255);
image(e12,width/3.7,42,290,360);

}else if (which==12) {
 background(255);
image(e13,width/3.7,42,285,360);

}else if (which==13) {
 background(255);
image(e14,width/3.7,44,298,360);
textFont(myFont);
textSize(30);
fill(250,20,80);
text("the egg came first!",25,150);

}

}
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please help me.