Export the active sprite to a png file scaling it to 2000%

Export x20.lua

local orig = app.activeSprite
if not orig then print("There is no active sprite to resize") end

local function replace_extension(path, newext)
  local file, ext = string.match(path, "(.-)([^.]*)$")
  if file and ext and file ~= "" and ext ~= "" then
    return file .. newext
  else
    return path .. '.' .. newext
  end
end

local spr = Sprite(orig) -- Duplicate sprite
spr:resize{ width=20*orig.width, height=20*orig.height }
spr:saveAs(replace_extension(orig.filename, 'png'))
spr:close()

app.activeSprite = orig