Added theaterChase and theaterChaseRainbow

Added two new effect functions. theaterChase does a
theater-marquee-style chase, and theaterChaserainbow combines the
theaterChase with the rainbow effect

examples/strandtest/strandtest.pde → examples/strandtest/strandtest.ino

@@ -45,13 +45,23 @@ void loop() {
   colorChase(strip.Color(  0,   0, 127), 50); // Blue
   colorChase(strip.Color(127,   0, 127), 50); // Violet
 
+  // Send a theater pixel chase in...
+  theaterChase(strip.Color(127, 127, 127), 50); // White
+  theaterChase(strip.Color(127,   0,   0), 50); // Red
+  theaterChase(strip.Color(127, 127,   0), 50); // Yellow
+  theaterChase(strip.Color(  0, 127,   0), 50); // Green
+  theaterChase(strip.Color(  0, 127, 127), 50); // Cyan
+  theaterChase(strip.Color(  0,   0, 127), 50); // Blue
+  theaterChase(strip.Color(127,   0, 127), 50); // Violet
+
   // Fill the entire strip with...
   colorWipe(strip.Color(127,   0,   0), 50);  // Red
   colorWipe(strip.Color(  0, 127,   0), 50);  // Green
   colorWipe(strip.Color(  0,   0, 127), 50);  // Blue
 
   rainbow(10);
   rainbowCycle(0);  // make it go through the cycle fairly fast
+  theaterChaseRainbow(50);
 }
 
 void rainbow(uint8_t wait) {
@@ -113,6 +123,41 @@ void colorChase(uint32_t c, uint8_t wait) {
   strip.show(); // Refresh to turn off last pixel
 }
 
+//Theatre-style crawling lights.
+void theaterChase(uint32_t c, uint8_t wait) {
+  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
+    for (int q=0; q < 3; q++) {
+      for (int i=0; i < strip.numPixels(); i=i+3) {
+        strip.setPixelColor(i+q, c);    //turn every third pixel on
+      }
+      strip.show();
+
+      delay(wait);
+
+      for (int i=0; i < strip.numPixels(); i=i+3) {
+        strip.setPixelColor(i+q, 0);        //turn every third pixel off
+      }
+    }
+  }
+}
+
+//Theatre-style crawling lights with rainbow effect
+void theaterChaseRainbow(uint8_t wait) {
+  for (int j=0; j < 384; j++) {     // cycle all 384 colors in the wheel
+    for (int q=0; q < 3; q++) {
+        for (int i=0; i < strip.numPixels(); i=i+3) {
+          strip.setPixelColor(i+q, Wheel( (i+j) % 384));    //turn every third pixel on
+        }
+        strip.show();
+
+        delay(wait);
+
+        for (int i=0; i < strip.numPixels(); i=i+3) {
+          strip.setPixelColor(i+q, 0);        //turn every third pixel off
+        }
+    }
+  }
+}
 /* Helper functions */
 
 //Input a value 0 to 384 to get a color value.