Improving Output of DFS visualization

[anand-2020]

Is your feature request related to a problem? Please describe.
After implementing the DFS algorithm on a graph, the edges can be classified into 4 types namely Tree Edge, Forward Edge, Cross Edge and Backward Edges. See this

Describe the solution you'd like
DFS algorithm is already implemented . Modify it such that after the visualization is completed, the colors of edges which belong to same group should be same and different from members of any other group. The following color code can be followed:

• Tree Edge: #01B878
• Forward Edge: #447EAE
• Backward Edge: #ED3C61
• Cross Edge: #F7F700

Describe alternatives you've considered
N/A

Additional context
N/A