/* du Feu tricolore V1 */
/* SORTIES */
#define orange 13
#define vert   12
#define rouge  11
/* ENTREE */
#define BP    10

/* Variable globale */
int state;
/* fonction testant le bouton  poussoir */
void bouton(void)
{
do
 {
   state=digitalRead(BP);
 }
while (state);
delay(200);
do
 {
   state=digitalRead(BP);
 }
while (!state);
return;
}
/****************************************************************************************/
void setup()
{
pinMode(orange, OUTPUT);
pinMode(vert, OUTPUT);
pinMode(rouge, OUTPUT);
pinMode(BP, INPUT_PULLUP); /* on place la resistance interne de pullup par programme  */

digitalWrite(vert, LOW);
digitalWrite(orange, LOW);
digitalWrite(rouge, HIGH);
}
/*****************************************************************************************/
void loop()
{
/* Etat 1 */
bouton(); /* on teste le bouton */ 

/* Vert seulement */
digitalWrite(rouge, LOW);
digitalWrite(vert, HIGH);

/* Etat 2 */
bouton();

/* orange seulement */
digitalWrite(vert, LOW);
digitalWrite(orange, HIGH);

/* ETAT 3 */
bouton();

/* rouge seulement */
digitalWrite(orange, LOW);
digitalWrite(rouge, HIGH);
}