Esp8266 3 step to reduce memory (#830)

Esp8266 3 step

plus xMethods with examples

examples/NeoPixelParallel/NeoPixelParallel.ino

@@ -0,0 +1,88 @@
+// NeoPixelParallel
+// This example will demonstrate the use of the X parallel method 
+// defined NeoPixelBus.
+//
+// There is serial output of the current state so you can confirm and 
+// follow along.
+//
+
+#include <NeoPixelBus.h>
+
+// define the NPB we want,
+// using GRB color order, the normal one for a WS2812x LEDs
+// x4 parallel channels method for WS2812x LEDs
+//   not all platforms can support parallel channels
+//   x8 and x16 maybe available depending on your platform
+// 
+// ESP32 - x4, x8, x16 (x4 aliased to x8)
+// ESP32S2 - x4, x8, x16 (x4 aliased to x8)
+// ESP32S3 - x4, x8, x16 (x4 aliased to x8)
+// RP2040 - x4 only
+//
+typedef NeoPixelBus<NeoGrbFeature, X4Ws2812xMethod> NPB;
+
+// make sure to set these to the correct pins and count for your setup
+// while the x4 parallel was used, 
+//   you can use less than all the defined channels
+NPB strips[] = { {60, 15},
+                 {60, 2},
+                 {90, 4},
+                 {30, 16} };
+
+void setup()
+{
+    Serial.begin(115200);
+    while (!Serial); // wait for serial attach
+
+    Serial.println();
+    Serial.println("Initializing...");
+    Serial.flush();
+
+    // must call begin for each strip
+    for (size_t strip = 0; strip < countof(strips); strip++)
+    {
+        strips[strip].Begin();
+    }
+
+    Serial.println();
+    Serial.println("Running...");
+}
+
+
+void loop()
+{
+    delay(5000);
+
+    //  show R,G,B,W in order on all strips
+    //
+    Serial.println("Colors R, G, B, W...");
+
+    for (size_t strip = 0; strip < countof(strips); strip++)
+    {
+        strips[strip].SetPixelColor(0, { 255,0,0 }); // red;
+        strips[strip].SetPixelColor(1, { 0,255,0 }); // green
+        strips[strip].SetPixelColor(2, { 0,0,255 }); // blue
+        strips[strip].SetPixelColor(3, { 255,255,255 }); // white
+
+        // only after all the strips show() method is called will 
+        // they actually get updated
+        strips[strip].Show();  
+    }
+
+
+    delay(5000);
+
+    // clear all strips to black
+    //
+    Serial.println("Colors off...");
+
+    for (size_t strip = 0; strip < countof(strips); strip++)
+    {
+        strips[strip].ClearTo( 0 ); // black
+
+        // only after all the strips show() method is called will 
+        // they actually get updated
+        strips[strip].Show();
+    }
+}
+