BeginGradientFill (linear)
The purpose is to swhow the gradient effect with a script. First, we insert an image which stands in level 0. Then we 'll build a frame composed of 4 parts.
At first, download image. 
Creating Objects
1 - Set up movie sizes 640x480 (background color #996600). Any Frame Rate 'd fit.
2 - Insert image in the middle of the scene. ( Menu Insert / Image )
Script
Method :
- First, we define hexadecimal constant for colors.
- For each gradient object:
- set up an empty clip, in a different level : CreateEmptyMovieClip
- set up 3 arrays which MUST have the same number of items : colors, alphas, ratios.
- set up an array for the gradient limits.
- fill in : beginGradientFill
- draw the frameborders.
- finish up filling.
In Outline, select Scene_1. Enter the following script :
onLoad () {
rouge = 0xFF0000;
vert = 0x00FF00;
bleu = 0x0000FF;
jaune = 0xFFFF00;
cyan = 0x00FFFF; // aqua
magenta = 0xFF00FF; // fuschia
aliceblue = 0xF0F8FF;
antiquesaddlebrown = 0xFAEBD7;
aquamarine = 0x7FFFD4;
azur = 0xF0FFFF;
beige = 0xF5F5DC;
bisque = 0xFFE4C4;
blanchedalmond= 0xFFEBCD;
blueviolet = 0x8A2BE2;
brown = 0xA52A2A;
burlywood = 0xDEB888;
cadetblue= 0x5F9EA0;
chartreuse= 0x70FF00;
chocolate= 0xD2691E;
coral = 0xFF7F50;
cornflowerblue= 0x6495ED;
cornsilk = 0xFFF8DC;
crimson = 0xE1643C;
darkblue = 0x00008B;
darkcyan = 0x008B8B;
darkgoldenrod= 0xB8860B;
darkgray = 0xA9A9A9;
darkgreen= 0x006400;
darkkhaki= 0xBDB76B;
darkmagenta= 0x8B008B;
darkolivegreen= 0x556B2F;
darkorange= 0xFF8C00;
darkorchid= 0x9932CC;
darkred = 0x8B0000;
darksalmon= 0xE9967A;
darkseagreen= 0x8FBC8F;
darkslateblue= 0x483D8B;
darkslategray= 0x2F4F4F;
darkturquoise= 0x00CED1;
darkviolet = 0x9400D3;
deeppink = 0xFF16493;
deepskyblue= 0x00BFBF;
dimgray = 0x696969;
dodgerblue= 0xE90FF;
firebrick = 0xB22222;
floralsaddlebrown= 0xFFFAF0;
forestgreen= 0x228B22;
gainsboro= 0xDCDCDC;
ghostsaddlebrown= 0xF8F8FF;
gold = 0xFFD700;
goldenrod= 0xDAA520;
gray = 0x808080;
greenyellow= 0xADFF2F;
honeydew= 0xF0FFF0;
hotpink = 0xFF69B4;
indianred= 0xCD5C5C;
indigo = 0x4B0082;
ivory = 0xFFFFF0;
khaky = 0xF0F68C;
lavender = 0xE6E6FA;
lavenderblush= 0xFFF0F5;
lawngreen= 0x7FFC00;
lemonchiffon= 0xFFFACD;
lightblue = 0xADD8E6;
lightcoral = 0xF08080;
lightcyan = 0xEFFFF;
lightgoldenrodyellow= 0xFAFAD2;
lightgreen= 0x90EE90;
lightgray = 0xD3D3D3;
lightpink = 0xFFB6C1;
lightsalmon= 0xFFA07A;
lightseagreen= 0x20B2AA;
lightskyblue= 0x87CEFA;
lightslategrey= 0x778899;
lightsteelblue= 0xB0C4DE;
lightyellow= 0xFFFFE0;
limegreen= 0x32CD32;
linen = 0xFAF0E6;
maroon = 0x800000;
mediumaquamarine= 0x66CDAA;
mediumblue= 0x0000CD;
mediumorchid= 0xBA55D3;
mediumpurple= 0x9370DB;
mediumseagreen= 0x3CB371;
mediumslateblue= 0x7B68EE;
midnightblue= 0x16916970;
mintcream= 0xF5FFFA;
mistyrose= 0xFFE4E1;
mocassin= 0xFFE4B5;
navajosaddlebrown= 0xFFDEAD;
navy = 0x000080;
oldlace = 0xFDF5E6;
olive = 0x808000;
olivedrab = 0x6B8E23;
orange = 0xFFA500;
orangered= 0xFF4500;
orchid = 0xDA70D6;
palegoldenrod= 0xEEE8AA;
palegreen= 0x98FB98;
paleturquoise= 0xAFEEEE;
palevioletred= 0xDB7093;
papayawhip= 0xFFEFD5;
peachpuff= 0xFFDAB9;
peru = 0xCD853F;
pink = 0xFFC0CB;
plum = 0xDDA0DD;
powderblue= 0xBE0E6;
rosybrown= 0xBC8F8F;
royalblue = 0x4169E1;
saddlebrown= 0x8B45163;
salmon = 0xFA8072;
sandybrown= 0xF4A460;
seagreen = 0x2E8B57;
seashell = 0xFFF5EE;
sienna = 0xAD522D;
silver = 0xC0C0C0;
skyblue = 0x87CEBB;
slateblue = 0x6A5ACD;
slategray = 0x708090 ;
snow = 0xFFFAFA;
springgreen= 0x00FF7F;
steelblue = 0x4682B4;
cuir = 0xD2B48C; // = tan
teal = 0x008080;
thistle = 0xD8BFD8;
tomato = 0xFF6347;
turquoise = 0x40E0D0;
violet = 0xEE82EE;
wheat = 0xF5DEB3;
saddlebrownsmoke= 0xF5F5F5;
yellowgreen= 0x9ACD32;
// inserted image level 0
niveau = 1; // start level
largeur_cadre = 32;
W_scene = 640;
H_scene = 480;
/*///// left edge //////////*/
// set up empty clip
// Anchor point = left top corner
_root.createEmptyMovieClip("cadreG", niveau);
// Warning : same number of items
// Set up colors for gradient
colors = [maroon , goldenrod, burlywood, saddlebrownsmoke ];
// alpha value for each item : 0 transparent 100 opaque
alphas = [100, 100, 100, 100];
// color ratios : 0 à 255 ( 00<-->FF)
ratios = [0, 150, 200, 50];
/*+++++++++++++++++++++++++++++++++++++++++++++++
matrixType is the string "box".
x and y are the horizontal (x) and vertical (y) positions relative to the
anchor point of the parent Sprite for the top-left corner of the gradient.
w : width of the gradient.
h : height of the gradient
r : rotation of the gradient in radians.
+++++++++++++++++++++++++++++++++++++++++++++++*/
matrix = {matrixType:"box", x:0, y:0, w:largeur_cadre, h:H_scene, r:0};
_root.cadreG.beginGradientFill("linear", colors, alphas, ratios, matrix);
// linestyle: thickness , hexa color , alpha
_root.cadreG.lineStyle(1, maroon, 75 );
// left edge
_root.cadreG.moveTo(0,0);
_root.cadreG.lineTo(0.7*largeur_cadre, 0.7*largeur_cadre);
_root.cadreG.lineTo(0.7*largeur_cadre, H_scene-0.7*largeur_cadre);
_root.cadreG.lineTo(0, H_scene);
_root.cadreG.lineTo(0,0);
_root.cadreG.endFill();
/*//// right edge ////////*/
niveau++;
_root.createEmptyMovieClip("cadreD", niveau);
matrix = {matrixType:"box", x:W_scene-largeur_cadre, y:0, w:largeur_cadre, h:H_scene, r:0};
colors = [saddlebrownsmoke, burlywood, goldenrod, maroon ];
ratios = [20, 50, 100, 250];
_root.cadreD.beginGradientFill("linear", colors, alphas, ratios, matrix);
// right edge
_root.cadreD.lineStyle(1, maroon, 75 );
_root.cadreD.moveTo(W_scene,0);
_root.cadreD.lineTo(W_scene, H_scene);
_root.cadreD.lineTo(W_scene-0.7*largeur_cadre, H_scene-0.7*largeur_cadre);
_root.cadreD.lineTo(W_scene-0.7*largeur_cadre, 0.7*largeur_cadre);
_root.cadreD.lineTo(W_scene,0);
_root.cadreD.endFill();
/*///// upper edge ///////*/
/*------------------------------------
Tip : set r:0 first, test to see proportions then set up correct value for r
-------------------------------------*/
niveau++;
_root.createEmptyMovieClip("cadreH", niveau);
matrix = {matrixType:"box", x:0, y:0, w: W_scene, h: largeur_cadre, r: Math.radians(90) };
colors = [maroon , goldenrod, burlywood, saddlebrownsmoke ];
alphas = [100, 100, 100, 100];
ratios = [0, 150, 200, 50];
_root.cadreH.beginGradientFill("linear", colors, alphas, ratios, matrix);
// upper edge
_root.cadreH.lineStyle(1, maroon, 75 );
_root.cadreH.moveTo(0,0);
_root.cadreH.lineTo(W_scene, 0);
_root.cadreH.lineTo(W_scene-0.7*largeur_cadre, 0.7*largeur_cadre);
_root.cadreH.lineTo(0.7*largeur_cadre, 0.7*largeur_cadre);
_root.cadreH.lineTo(0,0);
_root.cadreH.endFill();
/*//////// lower edge //////////*/
niveau++;
_root.createEmptyMovieClip("cadreB", niveau);
matrix = {matrixType:"box", x:0, y:H_scene-largeur_cadre, w: 640, h: largeur_cadre, r: Math.radians(90) };
colors = [saddlebrownsmoke, burlywood, goldenrod, maroon ];
alphas = [100, 100, 100, 100];
ratios = [20, 50, 100, 250];
_root.cadreB.beginGradientFill("linear", colors, alphas, ratios, matrix);
//lower edge
_root.cadreB.lineStyle(1, maroon, 75 );
_root.cadreB.moveTo(0,H_scene);
_root.cadreB.lineTo(W_scene, H_scene);
_root.cadreB.lineTo(W_scene-0.7*largeur_cadre, H_scene-0.7*largeur_cadre);
_root.cadreB.lineTo(0.7*largeur_cadre, H_scene-0.7*largeur_cadre);
_root.cadreB.lineTo(0,H_scene);
_root.cadreB.endFill();
}
Remark : For a radial gradient, set "radial" instead of "linear".