Note that if you catch the strings as you're swinging your arm back up, the chords sound twice as fast. Cool, Your arm doesn't swing any faster to produce twice the number of strums. These upstrums are on the offbeat. Count them with an and in between the numbers. Although these first two patterns are important to play and to understand, they're probably not what you'll end up using. A little monotonous, right?
Roll over the chart to see the visual rhythm animation.
Click the chart to hear the pattern.