Macro for Lay on Hands?

I was looking for a macro to use for the paladin Lay on Hands ability which gives it a nice appearance in the chat, something which allows for choosing the number of points healed and shows it in a nice box. I was using this (in the Damage field of an "attack"):

?{Lay on Hands|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32|33|34|35|36|37|38|39|40|41|42|43|44|45|46|47|48|49|50}

But I'm sure there must be a better way of doing it (and I would want it to go all the way to 100 so it would work all the way to level 20).

Are you using the 5e by Roll20 sheet? Are you using an Ammo tracker Mod and if so which one?

Yes, we are using that sheet, but not the Ammo tracker.

In that case a query macro is how I would do it also. Although I wouldn't have a drop down menu like that, I would just leave it blank and type in the number. 
?{Lay on Hands} will come up with a blank space to fill in with a typed value. 

As for appearance, you can do any 5e by Roll20 template or the default template, or create something of your own (such as an emote). That is more personal preference.
If you decide on what appearance you would like to emulate we can help you better. 

Since you have a Pro subscription, you might be interested in this macro that uses TokenMod and ChatSetAttr to give a nice output, prevent the Paladin from using more LoY than the target can be healed, automatically deduct the amount of used LoY points from the 'class_resource' field, and heal the target (if HP is linked to Bar1).

https://app.roll20.net/forum/post/9640227/healling-hands-macro-and-api/?pageforid=9651396#post-9651396