Help with variables and block rotation

Hey there! When i make a variable for custom block rotation, its not showing up in the procedures, im trying to have it be something like this:

"set blockrotation to random 0,1"

"if blockrotation > 0.75, set block rotation to east"

"if blockrotation < 0.75 and > 0.5, set block rotation to north"

"if blockrotation < 0.5 and > 0.25, set block rotation to west"

"if blockrotation < 0.25, set block rotation to south"

but variable "blockrotation" isn't showing up, is there any variable settings i could possibly change in order for this to work?