COLOURS
COLOUR_MATCHES
num_to_colours
getLED
RGBToHex
setAllPixelsColour
setPixelsColour
startup
changeBrightness
drawCircle
drawLine
drawStraightLine
drawRect
drawText
scrollText
randomiseText
testGraphics
displayImage
randomiseImage
precomputeCircularWave
precomputeRipple
precomputeWave
precomputeRain
precomputeLines
precomputeColours
mergeWaves
displayWave
changeWaveSpeed
randomisePatterns
displayRandomPatterns
objectDetected
getPhysicalXY
getDigitalXY
sensingCompensation
displayUltrasonicWave
checkUltrasonics
rainbowCycle
randomDots