picaxe mechatronics

init:
let dirsb = 255
let pinsb = pin1

main:
    if pin1 = 1 then
    goto wall
    else
    low 1
    low 2
    low 3
    low 4


    low 1
    high 2
    low 4
    high 3
    endif
goto main

wall:
'' reset values
    low 1
    low 2
    low 3
    low 4
'' go backwards for 2 secs
    high 1
    low 2
    high 4
    low 3
    wait 2
    '' reset
    low 1
    low 2
    low 3
    low 4
'' spin for ?3? secs

    low 1
    high 2
    low 3
    high 4
    wait 3
'' restart program
    goto main