how do i only use one group at a time

[burnt leaf]

Just just activated one stage at a time. But 0 is the last

[iron osprey]

i mean like how though

because i click space and it actuvates all at once

[burnt leaf]

Space activates just one stage at a time

[sage mulch]

Looks like you set it up backwards. The stages activate from bottom to top. So the staging stack should kinda look like your rocket

[iron osprey]

ohhhhh

i see