[请教]SHUFFLE中的箭头(ASS绘图)

最近写SHUFFLE的特效,仿造游戏里效果弄了个箭头进去,却还差个效果,就是让箭头的颜色从箭头到箭尾逐渐变色(非动态效果),在PS里这种效果是非常简单的(用渐变工具实现),但在ASS里却不知道怎么半好,哪位懂的请指教!~

下面是箭头的特效码:

[Script Info]
; // 此字幕由PopSub生成 2005-08-05 16:09:24
; // 版本: 0.73
; // popgo_fansub@yahoo.co.jp
; // 欢迎访问漫游天下 http://bbs.popgo.net
Title:漫游字幕
Original Script:漫游字幕组
Synch Point:0
ScriptType:v4.00+
Collisions:Normal
PlayResX:640
PlayResY:360
Timer:100.0000
[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: OP,麗流隷書,30,&H00ffffff,&H00838383,&H00000000,&H005e5e5e,-1,0,0,0,100,100,0,0.00,1,1,1,2,30,30,10,128
Style: title,幼圆,26,&H00ffffff,&H00b9cfff,&H0079a5ff,&H006f9dff,-1,0,0,0,100,100,0,0.00,1,2,2,2,20,20,20,134
Style: KFC,黑体,28,&H0fffffff,&H0000ffff,&H000080ff,&H00fffdff,-1,0,0,0,100,100,0,0.00,1,4,0,4,20,20,30,0
Style: Default,幼圆,24,&H00ffffff,&H0000ffff,&H00993300,&H00993300,-1,0,0,0,100,100,0,0.00,1,1,1,2,20,20,10,134
Style: LOGO,幼圆,32,&H000000ff,&H000000ff,&H00ffffff,&H00ffffff,-1,0,0,0,150,150,0,0.00,1,3,0,2,30,30,60,134
Style: Default1,幼圆,24,&H00ffffff,&H00838383,&H00000000,&H005e5e5e,-1,0,0,0,100,100,0,0.00,1,1,1,2,20,20,10,134
Style: STAFF,幼圆,12,&H00ffffff,&H00838383,&H00000000,&H005e5e5e,0,0,0,0,150,150,0,0.00,1,1,0,1,30,30,60,134
Style: ED,麗流隷書,24,&H00ffffff,&H00838383,&H00000000,&H005e5e5e,-1,0,0,0,100,100,0,0.00,1,1,1,2,30,30,10,128
[Events]
Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:06.90,KFC,NTP,0000,0000,0000,,{\move(0,360,800,360)}{\t(0,6500),50)}{\p1}m 0 0 l -88 -48 b -88 -48 -80 -40 -76 -16 l -800 -16 -800 16 -76 16 b -76 16 -80 40 -88 48 l -88 48{\p0}
Dialogue: 0,0:00:00.00,0:00:06.90,KFC,NTP,0000,0000,0000,,{\move(0,310,800,310)}{\fs40}Shuffle

汗!~如果要静态显示这个效果呢?
就是箭头不移动的情况下
\clip 貌似不是要分N个方格?