A nice bright background for a day party. While you can change the colors, you can even add or delete more shapes to the design. By clicking on the pattern, you will notice on your artboard that the pattern has been applied and this is how your artboard looks like.Your new pattern will appear here which can be used for backdrops and other designing projects for you. Choose any of the patterns and experiment with the colors as you like.You can create your own pattern and drag and drop it to the swatches tab. So make sure you have selected the rectangle that you just made. This only appears if the shape you just made is selected. On the top toolbar, you will notice the tab for ‘style’. You can also make your own pattern if you like, but if you are low on time and need to get things done then use the already inbuilt patterns. Initially, I wanted to add color to this shape, but then I remembered the pattern tab for Adobe Illustrator which has some really cool patterns which can be added to shape or even an outline. What I did for my backdrop is that I used the shape tool, and made a big rectangle on my artboard.The side toolbar where you will find all important tools for designing on Adobe Illustrator You, however, can use other tools if you need them in your design. The most commonly used tools for this would be the shape tool, the pen tool, and the text tool. Use the tools on the left tools panel to make shapes, draw anything and even add a pattern to your artboard.The is your backdrop base, which you will design now according to your taste. Choosing the right size of the artboard is a very important step as everything you make on it is in accordance with how it will be printed in large. Now, you can adjust your design, typography and anything else according to this size. This is how your artboard will look like.Make sure you are working in CMYK since you have to print this piece of art. I used the internet to calculate what the measurement in feet would be in inches. Since people will be standing in front of this backdrop, it should be taller than a tall man, and wide enough to have a bunch of people stand in front of it. The right dimensions for a backdrop, the ones commonly used, and the ones that I suggest are 8 by 10 feet, width, and height. You cannot make something on A4 size and then expand it for a backdrop or something that needs to be printed on a larger scale. The artboard size on Illustrator needs to be in the right dimensions for a backdrop.