(1)每按一次方向鍵準心就換一次顏色
   在consle中輸入
   bind  a  "+moveleft;  adjust_crosshair"
   bind  s  "+back;  adjust_crosshair"
   bind  d  "+moveright;  adjust_crosshair"
   bind  w  "+forward;  adjust_crosshair"


(2)每按一次滑鼠左鍵準心就換一次顏色
   bind  mouse1  "+attack;adjust_crosshair"