#let A0 = 10
#let C1 = F5+A0                 
#let F1 = 10
#let F3 = 20                    
#let F5 = F1+F3                 
#goto A0

let A0 = 10
let C1 = F5+A0                 
let F1 = 10
let F3 = 20                    
let F5 = F1+F3                 
#goto A0