Cleaned the code

examples/blinking_2_instances/blinking_2_instances.ino

@@ -1,55 +1,46 @@
-// This code will blink output 13 every 250 ms
-// abd will blink output 9 every 125 ms
+// This code will toggle output 13 every 250 ms
+// and will toggle output 9 every 125 ms
 
 
 // INCLUDE CHRONO LIBRARY : http://github.com/SofaPirate/Chrono
 #include <Chrono.h> 
 
-#define LED_A 13 // Define a LED pin
-#define LED_B 9 // Define another LED pin
+// Create variables for the LED pins
+int ledPinA =  13;
+int ledPinB =  9;
 
 // Create variables to hold the LED states
-int stateA = HIGH;
-int stateB = HIGH;
+int ledStateA = HIGH;
+int ledStateB = HIGH;
 
-// Instantiate a Chrono object.
+// Instantiate two Chronos
 Chrono chronoA; 
-
-// Instantiate another metro object and set the interval to 125 milliseconds (0.125 seconds).
-Chrono chronoB = Chrono(); 
+Chrono chronoB; 
 
 void setup()
 {
-  pinMode(LED_A,OUTPUT);
-  digitalWrite(LED_A,stateA);
+  pinMode(ledPinA,OUTPUT);
+  digitalWrite(ledPinA,ledStateA);
 
-   pinMode(LED_B,OUTPUT);
-  digitalWrite(LED_B,stateB);
+   pinMode(ledPinB,OUTPUT);
+  digitalWrite(ledPinB,ledStateB);
 
 }
 
 void loop()
 {
-  // Use Chrono as a metronome with an interval of 250 ms : 
+  // Use Chrono as a metronome with an interval of 250 ms: 
   if ( chronoA.hasPassed(250) ) {
-    chronoA.restart();
-    if (stateA==HIGH)  { 
-      stateA=LOW;
-    } else {
-      stateA=HIGH;
-    }
-    digitalWrite(LED_A,stateA);
+    chronoA.restart(); // restart the crono so that it triggers again later
+    ledStateA = !ledStateA; // !: toggle the state from 0 to 1 or from 1 to 0
+    digitalWrite(ledPinA,ledStateA);
   }
 
-  // Use Chrono as a metronome with an interval of 125 ms : 
+  // Use Chrono as a metronome with an interval of 125 ms: 
    if ( chronoB.hasPassed(125) ) { 
-    chronoB.restart();
-    if (stateB==HIGH)  { 
-      stateB=LOW;
-    } else {
-      stateB=HIGH;
-    }
-    digitalWrite(LED_B,stateB);
+    chronoB.restart(); // restart the crono so that it triggers again later
+    ledStateB = !ledStateB; // !: toggle the state from 0 to 1 or from 1 to 0
+    digitalWrite(ledPinB,ledStateB);
   }