Set variable to a random block between two locations

[Vexio]

Code:

                    while {mg.squish.status} = "active":
                        wait 10 ticks
                        set {_blocc} to a random block from {mg.squish.anvilCorner1} to {mg.squish.anvilCorner2}
                        set {_blocc} to anvil
                        chance of 25%:
                            wait 5 ticks

Error:

Can't understand this expression: `a random block from {mg.squish.anvilCorner1} to {mg.squish.anvilCorner2}`

Tried searching the forums?: Yes
Tried searching the docs?: Yes

Thanks for anyone that can help me!

 

[ShaneBee]

set {_a::*} to blocks between {_pos1} and {_pos2} // or blocks within {_pos1} to {_pos2}
set {_result} to random element out of {_a::*}

Didn't test hope it work