How to draw indoor pedestrian streamline analysis map

The method of making moving map with PS is:

1, create a new white background file and a new layer;

2. Use the Line Tool to set the size and color, and draw and rasterize the layer;

3.ctrl+ click the icon to load the selection, create a new layer, set the foreground to white, open the gradient tool, use the transparent line gradient, and drag the linear gradient on the arrow to complete.