Algorithm 2: Firefly algorithm based NBSs selection
1:	Initialize population$nbs=(nb{s}_1,nb{s}_2,\dots nb{s}_i)T$
2:	Perform the generation of initial firefly population, (1,2,…i)
3:	Calculate the light intensity I at $nb{s}_i$ using Equation (7) and obtain the $I_{best}$.
4:	While t < MAXGeneration
5:	For every i
6:	For every j
7:	update fitness function and find light intensity.
8:	For$n_f=1:N_{flies}$
9:	If$max(I_{nf}$ > $I^{best})$ then
10:	Replace with updated firefly.
11:	Else Randomly change function and generate new intensity.
12:	End If
13:	End For
14:	Determine the new solution using Equation (8) and update the light intensity.
15:	End For
16:	End For
17:	Make a ranking of the fireflies to locate the present best.
18:	End While