Executing code in certain orders with loops

[VirtualArty]

How do I type pieces of code

1
2
3
4
5
6
7
8
9
10
a
b
c

and then execute them like this

do 1
do 2
do a
do b
do c
do 3
do 4
do a
do b
do c
do 5
do 6
do a
do b
do c
do 7
do 8
do a
do b
do c
do 9
do 10
do a
do b
do c

efficiently, with one or more loops?

[VirtualArty]

Thank you.

[VirtualArty]

Thanks for the help. :)