Gradient's parameters:



Fill 0% on the layers

Continue, making use of the known instrument and draw one more figure with the next sizes:



Gradient Overlay:



Gradient's parameters:



Copy the layer with the previous figure; turn it around with Free Transform option. Place it like in the picture and paint it with the color 496538:



Continue with the instrument PenTool and make one more figure with the demonstrated sizes below:



Gradient Overlay:



Gradient's parameters:



Make use of the already known instrument and draw one more figure, having the next parameters:



Gradient Overlay:



Gradient's parameters:



If the layers have been placed correctly and everything has been done like in the picture, we'll get the next:



The final result!