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@@ -0,0 +1,36 @@
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+# define BELL_COUNT 4
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+# define IN_A 1
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+# define OUT_A 0
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+# define IN_B 4
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+# define OUT_B 2
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+
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+void setup() {
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+ pinMode(1, OUTPUT); //LED on Model A
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+ pinMode(OUT_A, OUTPUT);
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+ pinMode(OUT_B, OUTPUT);
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+ pinMode(IN_A, INPUT);
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+ pinMode(IN_B, INPUT);
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+ digitalWrite(OUT_A, HIGH);
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+ digitalWrite(OUT_B, HIGH);
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+ }
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+
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+ // the loop routine runs over and over again forever:
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+ void loop() {
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+ if(digitalRead(IN_A)) {
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+ bell(OUT_A);
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+ }
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+ if(digitalRead(IN_B)) {
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+ bell(OUT_B);
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+ }
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+ }
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+
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+ void bell(int pin) {
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+ for(int i=0;i<BELL_COUNT;i++) {
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+ digitalWrite(pin, LOW);
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+ delay(2000);
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+ digitalWrite(pin, HIGH);
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+ if(i < BELL_COUNT-1) {
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+ delay(3000);
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+ }
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+ }
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+ }
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