Create a new file with 450x450 px and 300 dpi of white color.

Take the instrument

and represent triangles of the same color –
2CA6D7 and place them exactly the same way from below.

Take the next instrument

to gradient with the color
97DCFA. Fill 77% on the layers. The gradient’s direction must be from left to the right side.

Take the following instrument

and represent a circle of the next parameters.
Blending Options-Gradient Overlay
Gradient’s parameters.

Take the next instrument

to draw a figure that would have the next sizes.
Blending Options-Gradient Overlay
Gradient’s parameters. 
Use the previous instrument to picture one more figure with the parameters form the next image.
Blending Options-Gradient Overlay