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void setup() {
for (int i = 0; i < 8; ++i) pinMode(i, OUTPUT);
analogReadResolution(8);
}
void loop() {
int len = 0;
int seq[1000];
while (len < 3) seq[len++] = random(0, 4); // generate 3 random numbers
while (1) {
seq[len++] = random(0, 4); // generate another random number
for (int i = 0; i < len; ++i) { // flash the LEDs according to seq
digitalWrite(2*seq[i], HIGH);
delay(500);
digitalWrite(2*seq[i], LOW);
delay(500);
}
for (int i = 0; i < len; ++i) {
while (analogRead(A0) < 240 && analogRead(A1) < 240 && analogRead(A2) < 240 && analogRead(A3) < 240); // wait for press
for (int j = 0; j < 4; ++j) // check which button was pressed and whether it matches seq
if (analogRead(A0+j) > 240 && seq[i] != j) goto DONE; // Legit use case of goto to jump out of 3 loops
delay(250);
}
for (int i = 0; i < 8; ++i) { // flash green lights 4 times
for (int j = 0; j < 4; ++j) digitalWrite(2*j, (i+1)%2);
delay(100);
}
}
DONE:
for (int i = 0; i < 2; ++i) { // flash red lights 4 times
for (int j = 0; j < 2; ++j) digitalWrite(2*j, 1);
delay(500);
for (int j = 0; j < 2; ++j) digitalWrite(2*j, 0);
delay(500);
for (int j = 2; j < 4; ++j) digitalWrite(2*j, 1);
delay(500);
for (int j = 2; j < 4; ++j) digitalWrite(2*j, 0);
delay(500);
}
delay(1000);
}
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