How to delete variables in a basic builder app

When you compile a basicbuilder app, any delvar command will not delete the variable. But, there is a way to delete the variable using two assembly programs celtic2 and Zrun. First you have to specify all of your delvar commands in Str9 like:

"Delvar ADelvar BDelvar C"→Str9

Now for the Code:

"TEMP"→Str2
"1234567890"→Str1
1→A
Repeat Str9≠"..P:NT:FN"
Str2+(Str1,A,1)→Str0
0→θ
asm(prgmCELTIC2
A+1→A
End
1→θ
asm(prgmCELTIC2
asm(prgmZRUN