Interior and exterior painting method and apparatus

A method comprising:

• automatically moving a first painting device along a grid to apply paint a to a surface in response to instructions from a computer processor as programmed by computer software in a computer memory;
• wherein the grid has a plurality of rows and columns;
• wherein the grid is fixed to a base;
• wherein the first painting device is attached to the grid and configured to move along the grid when attached to the grid, wherein each of the plurality of rows and columns of the grid functions as a track along which the first painting device is configured to move;
• and
• wherein the first painting device is connected to a painting container so that the first painting device is configured to receive paint from the paint container;
• wherein the paint container is attached to the grid and configured to move along the grid when attached to the grid, wherein each of the plurality of rows and columns of the grid functions as a track along which the painting container is configured to move;
• wherein the first painting device includes a first motor for moving the first painting device along the grid;
• and
• wherein the paint container includes a second motor for moving the paint container along the grid.