| /* |
| For Loop Iteration |
| |
| Demonstrates the use of a for() loop. |
| Lights multiple LEDs in sequence, then in reverse. |
| |
| The circuit: |
| * LEDs from pins 2 through 7 to ground |
| |
| created 2006 |
| by David A. Mellis |
| modified 30 Aug 2011 |
| by Tom Igoe |
| |
| This example code is in the public domain. |
| |
| http://www.arduino.cc/en/Tutorial/ForLoop |
| */ |
| |
| int timer = 100; // The higher the number, the slower the timing. |
| |
| void setup() { |
| // use a for loop to initialize each pin as an output: |
| for (int thisPin = 2; thisPin < 8; thisPin++) { |
| pinMode(thisPin, OUTPUT); |
| } |
| } |
| |
| void loop() { |
| // loop from the lowest pin to the highest: |
| for (int thisPin = 2; thisPin < 8; thisPin++) { |
| // turn the pin on: |
| digitalWrite(thisPin, HIGH); |
| delay(timer); |
| // turn the pin off: |
| digitalWrite(thisPin, LOW); |
| } |
| |
| // loop from the highest pin to the lowest: |
| for (int thisPin = 7; thisPin >= 2; thisPin--) { |
| // turn the pin on: |
| digitalWrite(thisPin, HIGH); |
| delay(timer); |
| // turn the pin off: |
| digitalWrite(thisPin, LOW); |
| } |
| } |