modify effects

- snake has a nice tail
- random is not so fast anymore
- merge sparks and sparks-color
- make more params available in json files


Former-commit-id: fc2a4f6f6ce2b44a35a75a9c0dbe36504b790be9

effects/random.py

@@ -1,24 +1,20 @@
-import hyperion
-import time
-import colorsys
-import random
+import hyperion, time, colorsys, random
+
+# get args
+sleepTime  = float(hyperion.args.get('speed', 1.0))
+saturation = float(hyperion.args.get('saturation', 1.0))
+ledData    = bytearray()
 
 # Initialize the led data
-ledData = bytearray()
 for i in range(hyperion.ledCount):
 	ledData += bytearray((0,0,0))
 
-sleepTime = 0.001
-
 # Start the write data loop
 while not hyperion.abort():
 	hyperion.setColor(ledData)
 	for i in range(hyperion.ledCount):
 		if random.randrange(10) == 1:
-			hue = random.random()
-			sat = 1.0
-			val = random.random()
-			rgb = colorsys.hsv_to_rgb(hue, sat, val)
+			rgb = colorsys.hsv_to_rgb(random.random(), saturation, random.random())
 			ledData[i*3  ] = int(255*rgb[0])
 			ledData[i*3+1] = int(255*rgb[1])
 			ledData[i*3+2] = int(255*rgb[2])