local function aimbot()
    local ply = LocalPlayer()
    local trace = util.GetPlayerTrace( ply )
    local traceRes = util.TraceLine( trace )
    local target = traceRes.Entity
    if target:IsPlayer() and ply:KeyPressed( IN_ATTACK2 ) or target:IsNPC() and ply:KeyPressed( IN_ATTACK2 ) then
        local head = target:LookupBone( "ValveBiped.Bip01_Head1" )
        local targetheadpos, targetheadang = target:GetBonePosition( head )
        ply:SetEyeAngles( ( targetheadpos - ply:GetShootPos() ):Angle() )
    else return nil
    end
end

hook.Add("KeyPress","attack2",aimbot)