function ENT:Draw()
	local aboveheadpos = self:GetPos() -- you do the headtracking
	local angle = (aboveheadpos-LocalPlayer():GetPos()):Angle()
	cam.Start3D2D( aboveheadpos, angle, 0.01 ) -- make the size tiny for crispness
		surface.DrawRect( 0, 0, 8, 8 )
		--write your text here using draw or surface
	cam.End3D2D()
end