The purpose of this tutorial is to show you how to create beautiful lines of different shapes that you can add to any image.
Open Guitar Silhouette image on Photoshop. Go to Image > Image Size and change width to 1125px and height to 1500px.
Select Brush Tool and press F5. Choose a hard round brush with 10 pixels and set up following presets for current brush:
Create a new layer and make a straight line (white color) by pressing Shift.
Apply Filter > Blur > Motion Blur with these settings: