Why was the Amiga Kickstart 1.x "Insert floppy" graphic so bad?

amiga_disc.bas

rem 
rem Why was the Amiga Kickstart 1.x "Insert floppy" graphic so bad?
rem 
rem https://news.ycombinator.com/item?id=26369057
rem https://www.youtube.com/watch?v=gXhxE4j6dm0
rem 
rem The machine-language code uses a simple program stored in an array to draw 
rem the different parts of the diskette, hand, and the fingers, run-time. 
rem This DSL implements three commands:
rem 
rem 1. Draw a polyline. Parameters: color index for the drawing pen 
rem    and an arbitrarily long list of x,y coordinates.
rem 2. Flood-fill an area. Parameters: color index of the desired fill color 
rem    and a single x,y coordinate for indicating where to begin filling.
rem 3. End the program
rem 

const palette = [7, rgb(12,12,12), rgb(0x70, 0x70, 0xC0), rgb(0x80, 0x80, 0x80)]
const polyLine = 255
const floodFill = 254
const endOfCommand = 255

color 0,7: cls
pushed = []

func pop
  local result, v1, v2
  if len(pushed) == 1 then
    result = pushed[0]
    pushed = []
  else
    read v1
    read v2
    result = [val("0x" + v1), val("0x" + v2)]
  endif
  return result
end

while 1
  [b1, b2] = pop
  if b1 == endOfCommand && b2 == endOfCommand then
    exit loop
  else if b1 == polyLine then
    a = []
    while 1
      v = pop
      if (v[0] == polyLine || v[0] == floodFill) then
        pushed << v
        exit loop
      else
        a << v
      endif
    wend
    drawpoly a color palette[b2]
  else if b1 == floodFill then
    [x, y] = pop
    paint x, y, palette[b2]
  else
    throw "unknown command"
  endif

wend 

pause

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