Da un punto al riquadro.

ecz: Change parameters values, to see the effects.
       What is the meaning of the parameters?

4 lines-segments, horizonthal or vertical, exist from a point inside a rectangle, to the border.

  1. rigth
  2. up.
  3. left
  4. down

p: 3 lines left to do (3 linee lasciate da fare). In ogni programma deve apparire solo 1, quindi 3 programmi.