[Error] [Java] paintutils:3: vm error: java.lang.ArrayIndexOutOfBoundsException: 256

-- Variables --
debug = "Debug"
w, h = term.getSize()

-- Values --

limeName = "Lime gem: "
limeSell = 10
lblueName = "Light blue gem: "
lblueSell = 15
yellowName = "Yellow gem: "
yellowSell = 50
orangeName = "Orange gem: "
orangeSell = 100

-- Stats --
money = 0
playerName = "nil"
limeGems = 0
lblueGems = 0
yellowGems = 0
orangeGems = 0
-- End Stats --

-- End Variables --
-- Game --

function playGame()
-- Variables --
slc = 1
minX = 13
maxX = w-1
minY = 2
maxY = h-1
maxGem = 20
spawnedGems = 0
newX = math.random(minX, maxX)
newY = math.random(minY, maxY)
local function frame()
term.setBackgroundColor(colors.black)
term.clear()
paintutils.drawLine(12, 1, 12, h, colors.red)
paintutils.drawLine(12, 1, w, 1, colors.red)
paintutils.drawLine(12, h, w, h, colors.red)
paintutils.drawLine(w, 1, w, h, colors.red)
paintutils.drawLine(1, 1, 1, h, colors.red)
paintutils.drawLine(1, 1, 1, h, colors.red)
paintutils.drawLine(2, 1, 2, h, colors.red)
paintutils.drawLine(3, 1, 3, h, colors.red)
paintutils.drawLine(4, 1, 4, h, colors.red)
paintutils.drawLine(5, 1, 5, h, colors.red)
paintutils.drawLine(6, 1, 6, h, colors.red)
paintutils.drawLine(7, 1, 7, h, colors.red)
paintutils.drawLine(8, 1, 8, h, colors.red)
paintutils.drawLine(9, 1, 9, h, colors.red)
paintutils.drawLine(10, 1, 10, h, colors.red)
paintutils.drawLine(11, 1, 11, h, colors.red)
term.setBackgroundColor(colors.lime)
term.setTextColor(colors.black)
term.setCursorPos(5, h-4)
print(" Exit ")
end
function spawnGem()
if spawnedGems >= maxGem then
	playGame()
else
	 paintutils.drawPixel(newX, newY, color)
	 spawnedGems = spawnedGems + 1
	 gem()
end
end




function gem()
while true do
newX = math.random(minX, maxX)
newY = math.random(minY, maxY)
colorNum = math.random(1,4)
	if colorNum == 1 then
	color = colors.orange
	spawnGem()
elseif colorNum == 2 then
	color = colors.yellow
	spawnGem()
elseif colorNum == 3 then
	color = colors.lime
	spawnGem()
elseif colorNum == 4 then
	color = colors.lightBlue
	spawnGem()
end
end
end
frame()
gem()
end




function frame2()
slc = 0
term.setBackgroundColor(colors.white)
term.clear()
term.setCursorPos(math.floor(w-string.len("Logged in as: "..playerName))/2, 2)
print("Logged in as: "..playerName )
paintutils.drawPixel(1, 4, 32)
paintutils.drawPixel(1, 6, 8)
paintutils.drawPixel(1, 8, 16)
paintutils.drawPixel(1, 10, 2)
term.setBackgroundColor(1)
term.setCursorPos(3, 4)
print(limeName ..limeGems)
term.setCursorPos(3, 6)
print(lblueName ..lblueGems)
term.setCursorPos(3, 8)
print(yellowName ..yellowGems)
term.setCursorPos(3, 10)
print(orangeName ..orangeGems)
term.setBackgroundColor(32)
term.setCursorPos(10, 15)
print("Play")
term.setCursorPos(20, 15)
print("Sell Gems")
end


function game()
term.clear()
term.setBackgroundColor(1)
term.setTextColor(32768)
term.clear()
term.setCursorPos(math.floor(w-string.len("Name: "))/2, 2)
write("Name: ")
playerName = read()
if playerName == "" then
game()
else
frame2()
end
end



-- End Functions --

game()

-- User Interaction --

while true do
		event, key, x, y = os.pullEvent()
		if event == "mouse_click" then
		if slc == 0 then
		if  x >= 10 and x <= 18 and y == 15 and key == 1 then
		 playGame()
		elseif x >= 20 and x <= 30 and y == 15 and key == 1 then
		 sellGems()
		elseif slc == 1 then
			if x >= 5 and x <= 10 and y == h-4 and key == 1 then
				slc = 0
				frame2()
end
end
end
end			
end