Now follow the steps and let’s start alexifying. Remember, you can click on the images to see it bigger

1. Open Adobe Photoshop, create a new canvass (size? depends on the design you’ll make), and choose the background you’d want to use. Mine is set to a dark bg (i just want it to be dark Hehe). After these, use the Rounded Rectangle Tool which is shown in the image below.

Drag the mouse into the canvas in such a way that you feel comfortable with the size of the shape we’ve created using the Rounded Rectangle Tool (anyways, you can use whatever shape you want). And oh, the radius will define the intensity of the curve in the edges – the higher, the more curvy

Right-click inside the rounded rectangle, click Make Selection and notice a pop-up window as shown below.

Leave the Feather Radius as is and click OK.

2. Now, create a new layer or simple press CTRL+J. Notice the new layer created under the Layer’s Tab.

After creating a new layer, we’ll be filling the rounded rectangle with a solid color. You can use whatever color you like. Just click inside the shape to fill it up with the chosen color.

After that, go to Select>Deselect or simply press CTRL+D to disable the moving lines in the shape

3. Right click on Layer 2 then choose Blending Options and notice a pop-up window as shown on the images below.

Select Stroke, you’ll notice it being checked when clicked.

Stroke is a blending option wherein the outline of the image/shape/text is coated with rich chocolate filling (Haha! Just kidding), outlined with the chosen color that you’ll use.
Under the Stucture, I’ve set the size to 15 and the Opacity to 20% (you can set it accordingly to your desired output). And under the Fill Type, I’ve chosen White as the color of the Stroke. Look at the image below.

After setting the Stroke Option, you should have an image like this.

4. Create another Layer or simple press CTRL+J. Drag the Layer3 in between Layers 1 and 2. We’ll be working with this layer in the rest of the steps.

5. Now here’s the fun part In this step always check if you are in Layer3. Use your favorite Brush to creatively design the edges of the shape. You can go crazy with the colors or stay simple by using one.

This is my sample work

Enjoy!