-open up a new picture and add a new layer
-click on the pen tool and add a little dot.(starting point).by simply clicking on the picture.
-then add another dot.and without letting go.drag it.so it'll curve.
-then keep on going.
-then right click the picture when you're done.and click on stroke path.
-then click on brush.
-then when the beam shows.right click again.and click on delete path.
-then click on the eraser tool.and erase the parts you dont want.^^then if you would like.change the color of the beam!