# test blending

import animate

var LEDS_LENGTH = 25
var strip
var front, back
var bri

strip = Leds(LEDS_LENGTH, gpio.pin(gpio.WS2812,0))
bri = 70

back = bytes().resize(LEDS_LENGTH * 4)
front = bytes().resize(LEDS_LENGTH * 4)
strip.clear_to(0x442211)
strip.show()

var back = animate.frame(LEDS_LENGTH)
var front = animate.frame(LEDS_LENGTH)
back.fill_pixels(0xFF2200, 80)
for i:0..24
  front.set_pixel(i, 0, 255, 0, (i*255)/24)
end
back.blend_pixels(back, front)

print("front=", front.tohex())
print("back =", back.tohex())
var pixels_buffer = strip.pixels_buffer()
print("pixs =", pixels_buffer.tohex())
back.paste_pixels(pixels_buffer, bri, true)
strip.dirty()
strip.show()

## Output:
# front= 00FF000000FF000A00FF001500FF001F00FF002A00FF003500FF003F00FF004A00FF005500FF005F00FF006A00FF007400FF007F00FF008A00FF009400FF009F00FF00AA00FF00B400FF00BF00FF00C900FF00D400FF00DF00FF00E900FF00F400FF00FF
# back = 0022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF000022FF00
# pixs = 020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701020701