basic Image draw

npc = {
" -------- ",
"|        |",
"|        |",
" --------",
"Merchant"}

local function picture(image,positionX,positionY)
    for y = 1,#image do
        term.setCursorPos(positionX,positionY + y - 1)
        term.write(image[y])
    end
end

local posX,posY = 1,1
while true do

    term.clear()
    picture(npc,posX,posY)

    local event = {os.pullEvent()}

    if event[1] == "key" then
        if event[2] == 200 then
            posY = posY - 1
        elseif event[2] == 208 then
            posY = posY + 1
        elseif event[2] == 203 then
            posX = posX - 1
        elseif event[2] == 205 then
            posX = posX + 1
        end
    end

end