the actual format 
:
NARR
Would you like to support the author?
choice (support_author)
< GEMS:5 > “Here, I contribute 5 gems!”{
}< GEMS:8 > “Here, I contribute 8 gems!”{
}< GEMS:12 > “Here, I contribute 12 gems!”{
}< GEMS:15 > “Here, I contribute 15 gems!”{
}“No, sorry!!”{
}
*Note : Don’t leave spaces inside the <> bracket. I had to do that t show it properly. The actual format of “Gems” is like <GEMS:5>
I hope it helps you 
!