Init

PortalATtiny.ino

@@ -0,0 +1,46 @@
+#include <Adafruit_NeoPixel.h>
+
+/* Change LEDS to the number of your leds */
+#define LEDS 43
+
+#define PIN 3
+
+#define RED 255
+#define GREEN 64
+#define BLUE 0
+
+Adafruit_NeoPixel strip(LEDS, PIN);
+
+float SPEED[LEDS];
+
+float getIntensity(const unsigned int *id, const unsigned long *timestamp) {
+  return 0.1 + (cos((float)*timestamp * 0.01 * SPEED[*id]) + 1.0) * 0.45;
+}
+
+void setup() {
+  strip.begin();
+  strip.show();
+
+  for (int s = 0; s < LEDS; s++) {
+    SPEED[s] = (float)random(100, 1000) / 1000.0;
+  }
+}
+
+void loop() {
+  unsigned long timestamp = millis();
+
+  for (int led = 0; led < LEDS; led++) {
+    float intensity = getIntensity(&led, &timestamp);
+
+    strip.setPixelColor(
+      led,
+      (float)RED * intensity,
+      (float)GREEN * intensity,
+      (float)BLUE * intensity
+    );
+  }
+
+  strip.show();
+
+  delay(2);
+}