Warning, /education/kturtle/scripts/2-function-recursion.turtle is written in an unsupported language. File is not indexed.

 kturtle-script-v1.0
 @(learn) a $n {
   $n = $n - 2
   @(fw) 10
   @(print) "a: " + $n
         @(if) $n <= 0 {
     @(return)
         }
   b $n
 }
 
 @(learn) b $n {
   $n = $n - 1
   @(fw) 10
   @(print) "b: " + $n
         @(if) $n <= 0 {
     @(return)
         }
   a $n
 }
 
 @(reset)
 a 20