Create a rectangle using rectangular shape tool. Press Ctrl+T. Right Click and select distort. Adjust the nodes to get the shape of ground as shown below.
Create another rounded rectangle to create depth using rounded rectangle shape tool. Press Ctrl+T. Right click the layer and select warp. Adjust nodes to get the shape as shown.
Select the upper part layer of icon. Ctrl+Click the layer thumbnail to get the selection. Create a new layer. apply white to black gradient in this layer. repeat steps for circle ...
Lets go back in time and look at Windows XP system icons. Well get inspired by an old computer icon. Then well create a simple monitor icon in that style. Icon ...
Select the upper part layer of icon. Ctrl+Click the layer thumbnail to get the selection. Create a new layer. apply white to black gradient in this layer. repeat steps for circle ...