use this
[Only registered and activated users can see links. Click Here To Register...] to chceck left up point of sea on minimap and right down also, you will have somethink like this
Color Picked: 1384480 at (231, 332)
Color Picked: 331277 at (318, 418)
and put it to line 75-78
mmx1 := 231
mmx1 := 332
mmx2 := 318
mmy2 := 418