Choose File > New or press CTRL + N, size 1440px (wide) x900px (height), you can also set the size you like
Select the Gradient tool and choose #084159 blue color to fill the background.
Now we add a light source, select the Brush Tool (B), set the size to 300PX, and then point out a bright spot in the center of the diagram to select a soft brush.
In this step, you will create 3D text. Here we want to first open illustrator, choose Address font, Font download, here we enter the I word on the canvas, is the text in the figure, and then in the fill color for #f57f20, "menu > Effect > three-dimensional > Bevel and Bevel", and then press the following setting.Classification: