init pixie skirt code

and add a gitignore

.gitignore

@@ -0,0 +1,2 @@
+*.py~
+*.ino~

Fiber_Optic_Pixie_Skirt/pixieskirt.ino

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+#include <Adafruit_Pixie.h>
+#include "SoftwareSerial.h"
+
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_LSM303_U.h>
+
+int ledMode = 0;  //FIRST ACTIVE MODE
+
+#define NUMPIXIES 5 // Number of Pixies in the fiber optics
+#define PIXIEPIN 6
+
+
+SoftwareSerial pixieSerial(-1, PIXIEPIN);
+
+Adafruit_Pixie strip = Adafruit_Pixie(NUMPIXIES, &pixieSerial);
+
+Adafruit_LSM303_Accel_Unified accel = Adafruit_LSM303_Accel_Unified(54321);
+Adafruit_LSM303_Mag_Unified mag = Adafruit_LSM303_Mag_Unified(12345);
+
+const float twirl = 7; // accelerometer threshold for toggling modes -- change this number to change sensitivity
+long twirlStart = 0;
+long twirlTime = 2000;
+
+
+// Set your colors for RandomFlash mode here.
+// just add new {nnn, nnn, nnn}, lines. They will be picked out randomly
+//                                  R   G   B
+uint8_t myFavoriteColors[][3] = {{255,   0,   0},   // red
+                                 {255,   150,   0},   // orange 
+                                 {251, 255, 0},   // yellow
+                               };
+// don't edit the line below
+#define FAVCOLORS sizeof(myFavoriteColors) / 3
+
+void setup() 
+{
+  Serial.begin(9600);
+     // Initialize the sensors
+   accel.begin();
+   mag.begin();
+   
+  strip.begin();
+  strip.show(); // Initialize all pixels to 'off
+}
+
+
+#define NUM_MODES 4  //change this if you add more modes
+
+//------------------MAIN LOOP------------------
+void loop() {
+    switch (ledMode) {
+       case 0: colorWipe(strip.Color(200, 20, 20), 20); break;   //  red
+       case 1: colorWipe(strip.Color(20, 200, 50), 20); break;   //   yellow
+       case 2: colorWipe(strip.Color(200, 0, 200), 20); break;  // purple
+       case 3: rainbowfill(); break;              //rainbow
+       case 4: flashRandom(5, 4); break;      // flash      
+    
+    }  
+
+   // Now read the accelerometer to control the motion.
+   sensors_event_t event; 
+   accel.getEvent(&event);
+ 
+   // Check for mode change commands
+   CheckFortwirls(event);
+
+  }
+
+// monitor orientation for mode-change 'gestures'
+void CheckFortwirls(sensors_event_t event)
+{
+   if (event.acceleration.x > twirl)
+   {
+     if (millis() - twirlStart > twirlTime)
+     {
+    Serial.println("Twirl!");
+    colorWipe(strip.Color(0, 0, 0), 10);
+    ledMode++;
+    if (ledMode > NUM_MODES){
+    ledMode=0; }
+     }
+   }
+   else if (event.acceleration.x < -(twirl + 1))
+   {
+     if (millis() - twirlStart > twirlTime)
+     {
+       Serial.println("Twirl Back!");
+    colorWipe(strip.Color(0, 0, 0), 10);
+    ledMode--;
+    if (ledMode < 0){
+    ledMode=NUM_MODES;     
+     }
+   }
+   else // no nods in progress
+   {
+     twirlStart = millis(); // reset timer
+   }
+}
+}
+
+void flashRandom(int wait, uint8_t howmany) {
+
+  for(uint16_t i=0; i<howmany; i++) {
+    // pick a random favorite color!
+    int c = random(FAVCOLORS);
+    int red = myFavoriteColors[c][0];
+    int green = myFavoriteColors[c][1];
+    int blue = myFavoriteColors[c][2]; 
+
+    // get a random pixel from the list
+    int j = random(strip.numPixels());
+    //Serial.print("Lighting up "); Serial.println(j); 
+    
+    // now we will 'fade' it in 5 steps
+    for (int x=0; x < 5; x++) {
+      int r = red * (x+1); r /= 5;
+      int g = green * (x+1); g /= 5;
+      int b = blue * (x+1); b /= 5;
+      
+      strip.setPixelColor(j, strip.Color(r, g, b));
+      strip.show();
+      delay(wait);
+    }
+    // & fade out in 5 steps
+    for (int x=5; x >= 0; x--) {
+      int r = red * x; r /= 5;
+      int g = green * x; g /= 5;
+      int b = blue * x; b /= 5;
+      
+      strip.setPixelColor(j, strip.Color(r, g, b));
+      strip.show();
+      delay(wait);
+    }
+  }
+
+}
+
+// Fill the dots one after the other with a color
+void colorWipe(uint32_t c, uint8_t wait) {
+  for(uint16_t i=0; i<strip.numPixels(); i++) {
+    strip.setPixelColor(i, c);
+    strip.show();
+    delay(wait);
+  }
+}
+
+// Fill the dots one after the other with a color
+void rainbowfill() {
+  strip.setPixelColor(0, strip.Color(255, 0, 0));
+  strip.setPixelColor(1, strip.Color(200, 100, 0));
+  strip.setPixelColor(2, strip.Color(0, 255, 0));
+  strip.setPixelColor(3, strip.Color(50, 50, 200));
+  strip.setPixelColor(4, strip.Color(255, 0, 255));
+  strip.show();
+  delay(100);
+}