Let’s take a look at the effect first:

renderings
Let’s start making:
1. Open the dance material.

Figure 1
2. Use the pen tool to create the following path.

Figure 2
3. Create a new layer, select a soft-angle brush, set the foreground color and background color to white and black respectively, open the path panel, right-click the previously created path, select the stroke path, and check "Simulate pressure".

Figure 3
4. Layer>>Layer Style>>Outer Glow.

Figure 4
Get the following effect:

Figure 5
5. Create a layer mask and use a black brush to mask the parts blocked by the legs.

Figure 6
Get the following effect:

Figure 7