Added example colorwave showing use of tuples when calling functions

README.md

@@ -16,7 +16,7 @@ pixels = ws2812b.ws2812b(10,0,0)
 This class has many methods, two main ones being show() which sends the data to the strip, and set_pixel which sets the colour values for a particular LED. The parameters are LED number, red, green, blue or a tuple of form (red, green blue) with the colours taking values between 0 and 255.
 
 At the moment, this isn't working with the interpreter, so you have to run it from a file. Looks like it's running just too slow to keep up with the PIO buffer from the interpreter. The key methods are set_pixel(r,g,b), set_pixel_line(p1, p2, r, g, b) which sets a row of pixels from pixel p1 to pixel p2 (inclusive), and fill(r,g,b) which fills all the pixels with the colour r,g,b.
-Every method also works with tuple containing rgb values: set_pixel(num, (r,g,b)) and set_pixel_line_gradient(p1, p2, rgb1, rgb2) where rgb1 and rgb2 are of form (r,g,b). This enables writing simpler code for certain usecases.
+Every method also works with tuple containing rgb values: set_pixel(num, (r,g,b)) and set_pixel_line_gradient(p1, p2, rgb1, rgb2) where rgb1 and rgb2 are of form (r,g,b). This enables writing simpler code for certain usecases, one of such is in examples folder: "colorwave.py"
 
 ```
 pixels.set_pixel(5,10,0,0)

examples/colorwave.py

@@ -0,0 +1,32 @@
+# Example showing how functions, that accept tuples of rgb values,
+# simplify working with gradients
+
+import time
+import ws2812b
+
+numpix = 60
+strip = ws2812b.ws2812b(numpix, 0, 0)
+
+red = (255, 0, 0)
+orange = (255, 50, 0)
+yellow = (255, 100, 0)
+green = (0, 255, 0)
+blue = (0, 0, 255)
+indigo = (100, 0, 90)
+violet = (200, 0, 100)
+colors = [red, orange, yellow, green, blue, indigo, violet]
+
+step = round(numpix / len(colors))
+current_pixel = 0
+strip.brightness(20)
+
+for color1, color2 in zip(colors, colors[1:]):
+    strip.set_pixel_line_gradient(current_pixel, current_pixel + step, color1, color2)
+    current_pixel += step
+
+strip.set_pixel_line_gradient(current_pixel, numpix - 1, violet, red)
+
+while True:
+    strip.rotate_right(1)
+    time.sleep(0.042)
+    strip.show()

ws2812b.py

@@ -61,7 +61,7 @@ class ws2812b:
             
             self.set_pixel(left_pixel + i, (red, green, blue))
 
-    # Set an array of pixels starting from "pixel1" to "pixel2" to the desired color.
+    # Set an array of pixels starting from "pixel1" to "pixel2" (inclusive) to the desired color.
     # Function accepts (r, g, b) tuple or individual rgb values
     def set_pixel_line(self, pixel1, pixel2, rgb_or_red, green=0, blue=0):
         if type(rgb_or_red) is not tuple:
@@ -69,7 +69,7 @@ class ws2812b:
         else:
             rgb = rgb_or_red
 
-        for i in range(pixel1, pixel2+1):
+        for i in range(pixel1, pixel2 + 1):
             self.set_pixel(i, rgb)
 
     # Set red, green and blue value of pixel on position <pixel_num>