Single Nozzle Dual Extrusion

Hi I am ready to try this. I don’t really know how dual extruder works on Astroprint but the settings posted on that page need individual extruder settings. Im not sure how to set Astroprint as I need as first need is to set two gcode to both extruder (extruder 0 and 1). But there is only a nozzle. Any ideas about port this to Astroprint settings?

Thanks so much