for i, line in ipairs(lines) do
      if type(line) == 'table' then
        local drawing = line

    if lines.current then
      local drawing = lines.current
      if type(drawing) == 'table' then

          lines.current = drawing

  propagate_to_drawings(x,y, button)

function propagate_to_drawings(x,y, button)
  for i,drawing in ipairs(lines) do
    if type(drawing) == 'table' then
      local x, y = love.mouse.getX(), love.mouse.getY()
      if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
        lines.current = drawing
      end
    end
  end
end