need help with simple warrior macro

hey guys
i need help, im stuck like 2 hours on this macro

all i want to do is , cast " [Colossus Smash]" , then if i have extra rage just do “Slam”

i want it as 1 button.

i made CS + heroic and it was perfect. like this

/castsequence Colossus Smash
/cast Heroic Strike

is there anyone that can help?

Accidental double post, please ignore.

I don’t have a Warrior to test this but couldn’t you just use the leading zero technique?

/castsequence reset=0.3 0,Slam
/castsequence Colossus Smash