+- basic/buttons/button_state_3/button_state_3.ino
+- basic/buttons/button_state_4_state/button_state_4_state.ino
+
+Programmazione: operatori logici
+-----------------------------------
+
+- programming/operators/operator_3_logic/operator_3_logic.ino
+
+State machine: And
+-------------------
+
+- basic/buttons/button_state_4_state_and_condition/button_state_4_state_and_condition.ino
+
+
+For loop / while
+==================
+- programming/loops/loop_3_multi_led/loop_3_multi_led.ino
+- Array: programming/loops/loop_4_multi_led_array/loop_4_multi_led_array.ino
+
+
+Light sensor
+===============
+
+- basic/analog_input/photo_3_serial/
+- Calibrazione manuale: basic/analog_input/photo_4_calibrated/
+- Calibrazione automatica: basic/analog_input/photo_5_calibration/
+- Smoothing: basic/analog_input/photo_6_smooth/
+- basic/analog_input/photo_7_tonePitchFollower/
+
+Piezo
+========
+- Traduzione tra due percezioni: basic/analog_input/photo_7_tonePitchFollower/
+- Singole note e pull up: piezo/keyboard_three_pullup_buttons/
+- Melodia: piezo/piezo_3_toneMelody/
+- Melodia: piezo/piezo_4_mario_tune/
+
+
+RGB
+======
+
+TODO
+
+
+TODO
+==========
+- funzioni
+- random
+- pitch follower
+- RGB
+
+