Butialo is a user-friendly environment that allows programming of the Butiá in the Lua language. Lua is a simple imperative scripting language but can create sophisticated programs. It is a dynamic language with automatic memory management and is extremely fast. Butialo is a derivative of the Pippy IDE (Python environment provided with the XO), which simplifies the creation of programs for the presence of components connected to the Butiá and offering snippets of code to access them.
The authoritative documentation is in the Spanish language at 
Download the Activity at 
Move forward until there is an obstacle.
Motores.setvel2mtr( 1, 500, 1, 500 ) while true do local dist = Dist.getDistancia() if dist<700 then Motores.setvel2mtr( 1, 0, 1, 0 ) repeat wait(1) dist = Dist.getDistancia() until dist > 700 Motores.setvel2mtr( 1, 500, 1, 500 ) end end
Can also be programmed with events. The previous program is equivalent to the following:
local function adelante() Motores.setvel2mtr( 1, 500, 1, 500 ) end local function esperar() Motores.setvel2mtr( 1, 0, 1, 0 ) wait( 1 ) end events.add( Dist.getDistancia, '<', 700, esperar ) events.add( Dist.getDistancia, '>', 700, adelante ) events.go()