Lay on Hands macro

[Gravius]

Hi guys, I need some help for a macro: i want to create a macro to cast Lay on Hands on myself if I press the left button of the mouse and on the target to target if I press the right button.
Is it possible to be done? Sorry but I'm not good at all with this stuff!

Thanks in advance for your help!

[Mordret]

#showtooltip
/cast [@player, btn:1][@targettarget,nodead,help, btn:2] Lay on Hands