Create a new 500 x 500px image in Photoshop.
Write a random text like “Incvice”.
Duplicate the layer with the text.
By using the arrows from your keyboard, drag the text from the duplicated layer under the text from the original layer.
Click on Edit > Transform > Flip Vertical.
With the duplicated layer selected in the layer tab, click on “Add layer mask”. (The button near FX).
Click on the Gradient Tool from Tools and drag a line from the top to the bottom of the text from the duplicated layer.
You can press shift and drag in order to drag a straight line. You can draw the lines multiple times until you are fine with your result.