Step 2: Draw a straight horizontal line. Step 3: Draw a straight vertical line. Step 4: Draw a straight diagonal line. Step 5: Draw a straight diagonal line oriented in the opposite direction. Step 6: Make two small dots. Step 7: Use a ruler to draw a line to connect the dots. Step 8: With a fresh piece of paper, draw anything you wish using straight lines only. Use glue, scissors, colored paper, markers, paint, or anything else you desire to create your artwork.
See below a painting made with horizontal and diagonal lines by artist Piet Mondrian, entitled 'View from the Dunes with Beach and Piers.'