private void TimerTick()
{
var b = 80; // brightness
var d = 2; // darkness
var len = 3;
var spacing = 22;
var delta = 0; // block strand delta
testImage.GenerateTestImage(testImageFrame, 3, b, d, len, spacing, delta, true, true);
Device.WriteImage(testImage.data);
++testImageFrame;
}