Может быть так?
Код
local real x = GetWidgetX(Musa1)
local real y = GetWidgetY(Musa1)
call CreateUnit(Player(0), 'hpea', x + Mur * Cos(0 * 0.0174532), y + Mur * Sin(0 * 0.0174532), 0.)
call CreateUnit(Player(0), 'hpea', x + Mur * Cos(90 * 0.0174532), y + Mur * Sin(90 * 0.0174532), 90.)
call CreateUnit(Player(0), 'hpea', x + Mur * Cos(180 * 0.0174532), y + Mur * Sin(180 * 0.0174532), 180.)
call CreateUnit(Player(0), 'hpea', x + Mur * Cos(270 * 0.0174532), y + Mur * Sin(270 * 0.0174532), 270.)