Fast loop question

[blur]

Can I not stack loops like this? The end command just ends the entire macro.

rep 99999999999999
3
key+ w
rep 2
key 4
key+ S
1
lef
7
key- S
key 1
key+ S
1
rep 4
lef
3
key- S
key 2
key+ S
1
lef
5
key- S
key 4
key+ S
1
lef
7
key- S
key 1
key+ S
1
rep 6
lef
3
key- S
key 4
key+ S
1
lef
8
key- S
1
key- w
1
key s
1
key r
1
key 5
1
lef
145
key w
3
key r