R value question

[Nemoid]

Is there away to sequentially update r values in a loop?
What I have is a long series of r values that I wish to use as positioning data but instead of writing all the individual r values in a program I wanted to create a loop as below but each time the loop runs the next r value in the sequence is loaded so:

R1-R40 all have data

R100=40; used to count
Loop:
R100=R100-1
A command here to move R1 to R2 etc
G1 x=r1 f500
If R100 > 0 gotob loop

Hope this makes sense

[DMU_200FD_KEITH]

I think this may help you.

You can specify R values with an equation in that line
Like R1=R1+1 or minus as well.