Well you cant if hes over another player but you can search for him by using colors if a color thats very unique to him eg for a chicken the red then when It finds the color it will use the Cords where it found the color to use as part of a box to find another color Example code:
SCAR Code:
if(FindColorTolerance(xx, yy, 397183, 6, 7, 513, 335, 10)) then //Find The Unique Color
begin
wait(300+random(100));
if(FindColorTolerance(xx, yy, 15460843, xx, yy, xx+20, yy+20, 15)) then //Look At The +20 to the xx and yy
begin
MMouse(xx, yy, 5, 5);
if(Option2('Rune')) then //See If its the thing your looking for
begin
ClickMouse(true); //CLick Mouse
end;
end;
end;