c = machine.order();
machine.conveyor();
if (c == "purple")
{red.spray()+blue.spray();
machine.conveyor();
}
else{
    if (c == "orange") {red.spray()+yellow.spray();
        machine.conveyor();}
    else{
        if (c == "green") {blue.spray()+yellow.spray(); machine.conveyor();}
        else{
            if (c == "brown") {blue.spray()+yellow.spray()+red.spray();machine.conveyor();}
            }
        }
    }