Bar Graph Toggle From Keyboard

/*

Bar Graph Toggle From Keyboard

*/

int c;

void setup() {

Serial.begin(9600);

pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);

digitalWrite( 3, HIGH);
digitalWrite( 4, HIGH);
digitalWrite( 5, HIGH);
digitalWrite( 6, HIGH);
digitalWrite( 7, HIGH);
digitalWrite( 8, HIGH);
digitalWrite( 9, HIGH);
digitalWrite(10, HIGH);

}


void loop() {


if (Serial.available()) {

c = Serial.read();

if (c >= '1' && c <= '8') {

c = c & 0x0f; // Convert ascii to int
c += 2; // pins 3-10 == keys 1-8

digitalWrite(c, !digitalRead(c)); // Toggle pin
}
}
}