Do you want to create an animation of twelve bouncing colorful polygons using Flash and Action Script? In this animation, twelve polygons will keep bouncing after an edge hits a wall. The area is a rectangle so that each of the polygons will keep bouncing inside the rectangle. What we need to produce the animation is just a script (no movie clip at all).

Demo preview

http://xhanch.com/gallery/action-script/colorful-bouncing-rectangles.swf

Source Code

//By    : Xhanch Studio
//URL   :  http://xhanch.com/action-script-colorful-bouncing-rectangles/ 

//Bouncing area setup
bt = 0;
bl = 0;
bb = 400;
br = 550;    

//Variable declaration
this._v = Array();
this._o = Array();

//Lines colour setup
this._c = Array(
    0xFF0000,
    0x00FF00,
    0x0000FF,
    0x0FF000,
    0x000FF0,
    0x0F000F,
    0xF0F000,
    0x00F0F0,
    0x000F0F,
    0xF00F00,
    0xF000F0,
    0xF0000F
);

//Coordinate initialization
k10 = 2*br/3;
k11 = 0;
k20 = 0;
k21 = bb/3;
k30 = br/3;
k31 = bb;
k40 = br;
k41 = 2*bb/3; 

//Number of polygons
rect = 12;

//Polygon initialize
function bouncing_line_init(ind, init_pos){
    this._v[ind] = Array();
    this._o[ind] = Array();    

    //Speed initialize
    this._v[ind][0] = Array(4, 4);
    this._v[ind][1] = Array(4, 4);
    this._v[ind][2] = Array(-4, -4);
    this._v[ind][3] = Array(-4, -4);

    for(i=0;i<4;i++)
        this._o[ind] = Array(init_pos[0], init_pos[1]);
}

//Polygon animate
function bouncing_line_animate(ind){
    //Next coordinate calculation
    for(i=0;i<4;i++){
        this._o[ind][0] += this._v[ind][0];
        this._o[ind][1] += this._v[ind][1];
    }

    //Draw the polygon
    this.lineStyle(1,this._c[ind],100);
    this.moveTo(this._o[ind][0][0], this._o[ind][0][1]);
    for(i=1;i<4;i++)
        this.lineTo(this._o[ind][0], this._o[ind][1]);
    this.lineTo(this._o[ind][0][0], this._o[ind][0][1]);

    //Speed determination
    for(i=0;i<4;i++){
        if(this._o[ind][0] < bl || this._o[ind][0] > br)
            this._v[ind][0] = -this._v[ind][0];
        if(this._o[ind][1] < bt || this._o[ind][1] > bb)
            this._v[ind][1] = -this._v[ind][1];
    }
}

//Stage setting
Stage.scaleMode = "noScale";
Stage.align = "TL";

//Polygons initialization
for(j=0;j<rect;j++){
    spc = j*20;
    bouncing_line_init(j, Array(
        Array(k10-spc,k11),
        Array(k20,k21+spc),
        Array(k30+spc,k31),
        Array(k40,k41-spc)
    ), this._c[j]);
}

//Animate process
this.onEnterFrame = function(){
    this.clear();
    for(j=0;j<rect;j++)
        bouncing_line_animate(j);
}