Chevron is a great idea for an awesome baby boy's nursery - that will grow with him! It will last for years and be a great backdrop for boy's name (in wooden letters) or art.
Following, are step by step directions - telling 'how to' I painted this Chevron wall.
The first step is to make a plan! You basically need to measure the length and height of the wall and divide it (as close as possible) to even squares. In my example above, I had 16/11" marks going across the top and 8/10.87" marks going down the length of wall. After I calculated this, I used a level to make little 'X's - marking off squares on the whole wall. This sounds harder than it is, so don't be overwhelmed! Once you make the marks across the top, you can draw a level line down (from each mark) and then draw a vertical line, from each mark you have made on side of wall. And, Voila - you have squares!!
HELPFUL HINT: Use a (gray toned) watercolor pencil to draw your lines. Draw lightly. If you are doing this on a background with 'eggshell' finish, the watercolor pencil marks should easily wipe off (with damp paper towel) once you are done.
The next step is the most time consuming. You must now tape off all chevron stripes. You will need an old credit card to smooth out and tighten tape and to make sharp, pointed corners. Remember, you must tape on the outside of every Chevron stripe. You also need to have a perfect point (see pic below).
Once the wall is completely taped - run your credit card over all tape, to tighten the tape as much as possible. Then, lightly brush one coat of paint (feathering the edges) along all paint lines. After this dries, use a small roller to roll inside of lines. Then, go back and repaint all edges with a brush and roll a second coat.
Remove tape as you go along - after completing second coat. Note, I always remove paint as quickly as possible! If you leave the paint on for hours, it may pull off your paint when you remove it.
Final Note: When you remove tape, you will probably have a few spots where the darker paint has bleed through. You can then take a small flat artists brush and touch up (using your wall's base paint). If you don't have a real steady hand. Just wait til the next day and use a little tape wherever you need to touch up.