求高手看下这个脚本怎么写

我执行完一遍后还是从4091开始。我要实现执行一次从4091开始，下一次是4092，再下一次是4093，一次类推。应该怎么改呢？谢谢高手。
'==========以下是按键精灵录制的内容==========
MoveTo 334, 190
Delay 297
MoveTo 335, 190
Delay 109
MoveTo 375, 188
Delay 125
MoveTo 394, 184
Delay 172
MoveTo 424, 184
Delay 109
MoveTo 431, 184
Delay 329
MoveTo 443, 186
Delay 531
MoveTo 440, 186
Leftclick 1
Delay 3031
MoveTo 1103, 663
Delay 828
LeftDown 1
Delay 157
MoveTo 1102, 663
Delay 109
MoveTo 1059, 662
Delay 109
MoveTo 1024, 660
Delay 172
MoveTo 1017, 660
LeftUp 1
Delay 469
MoveTo 1017, 659
Delay 188
KeyDown "BackSpace", 1
Delay 78
KeyUp "BackSpace", 1
Delay 593
i = 4090
a=i+1
for 1
SayString a
Delay 1000
next
Delay 1141
MoveTo 1018, 659
Delay 109
MoveTo 1050, 659
Delay 110
MoveTo 1125, 671
Delay 109
MoveTo 1166, 680
Delay 141
MoveTo 1186, 695
Delay 93
MoveTo 1188, 705
Delay 360
MoveTo 1188, 704
Delay 172
MoveTo 1188, 698
Leftclick 1
Delay 3094
MoveTo 741, 510
Delay 109
MoveTo 723, 496
Delay 125
MoveTo 718, 490
Delay 62
MoveTo 717, 488
Leftclick 1
Delay 3235
MoveTo 715, 488
Delay 109
MoveTo 343, 383
'==========以上是按键精灵录制的内容==========