This is a simple drawing program. Use paintWhite() and stopPainting() to command the robot to put its brush on the ground or not. The robot can leave a line on the ground.
Open the map openArea.map
There is enough space to create a nice piece of art.
Use remote control (Run > Remote control) to let the robot paint.
See also: basic instructions: paint, and move

#character 'A'
paintWhite()


forward(2)
right()
forward(1)
right()
forward(2)
backward(1)
right()
forward(1)


stopPainting()

Let the robot take one step at a time

• Check if the white spot is on the left
• If it sees the spot, it has to stand on the spot and it is finished
• Else take another step forward and check if the spot is on the left
• This can be repeated in a loop

See also: basic instructions: move, see,
programming structures: loops, if-structures, end

repeat(){
    if(leftIsWhite()){
        # There's a white spot on your left
        left()
        forward(1)
        end
    }
    else{
        # There's no white spot yet
        forward(1)
    }
}

Another way to do this: repeat moving forward until you don't see a wall anymore. Then turn and move on to the white spot.

repeatWhile(leftIsObstacle()){
    forward(1)
}


left()
forward(1)

• Bring the robot to the beginning of the track (Follow the Yellow Brick Road!)
• Keep on the track step by step

 # Go to the start of the line
right()
forward(8)


# Keep on track step by step
repeat()
{
    if(frontIsWhite()){	
        forward(1)
    }
    else if(rightIsWhite()){
        right()
    }
    else if(leftIsWhite()){
        left()
    }
    else if(frontIsObstacle()){
        end
    }
}

Another approach is to use recursion. Write a recursive procedure called follow().

# Go to the start of the line
right()
forward(8)


# Start tracking
follow()


# Recursive definition for tracking
procedure follow(){
    if(frontIsWhite()){	
        forward(1)
        follow()
    }
    else if(rightIsWhite()){
        right()
        follow()
    }
    else if(leftIsWhite()){
        left()
        follow()
    }
    else if(frontIsObstacle()){
        # Finish the current procedure call
        # (because there is nothing to after 
        # this return, all calls will be finished
        # and the program stops)
        return
    }
}

Open maze1.map

See also: basic instructions: move, see,
programming structures: loops, if-structures, end

repeat(){	
    if(rightIsObstacle()){
        if(frontIsClear()){
            forward(1)
        }
        else{
            left()
        }
    }
    else{
        right()
        forward(1)
    }

    if(frontIsBeacon()){	
        pickUp()
        end
    }
}