added an example, removed fake ones

Author: wkoch

SlowPWM.cpp

@@ -35,10 +35,10 @@ void SlowPWM::update() {
       _end  = _start + _duty_cycle;
       if (_start == 0) {_start = _now;}
     }
-    if (_now >= _start && _now <= _high && !_active) {
+    if (BETWEEN(_now, _start, _high) && !_active) { // _now >= _start && _now <= _high
       digitalWrite(_output, HIGH);
       _active = true;
-    } else if (_now > _high && _now < _end && _active) {
+    } else if (BETWEEN(_now, _high, _end) && _active) { // _now > _high && _now < _end
       digitalWrite(_output, LOW);
       _active = false;
     } else if (_now >= _end) {

examples/OneButtonThreeLevels/OneButtonThreeLevels.ino

@@ -0,0 +1,14 @@
+#include <SlowPWM.h>
+
+// 1 Led PWM.
+
+SlowPWM myLedPWM(1000, A0, 13); // Creates a SlowPWM object.
+
+void setup() {
+  pinMode(A0, INPUT);
+  pinMode(13, OUTPUT);
+}
+
+void loop() {
+  myLedPWM.on();
+}