| /* | |
| 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. | |
| https://www.arduino.cc/en/Tutorial/BuiltInExamples/ForLoopIteration | |
| */ | |
| 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); | |
| } | |
| } | |