Explain what the for-loop is doing in lines 24 and 25.

GlowScript 2.7 VPython \begin\{code } \#\# Scene Setup scene = display ( width =1000, height =1000) \#Parameters and Initial Conditions k=9e9 cloud_height =500 Q1=50 Q2=100 Q3=50 \#0bjects cloud_1 = sphere ( pos =vec(500, cloud_height, 0),Q=Q1, radius =50, color = color. white ) cloud_2 = sphere ( pos =vec(100, cloud_height, 0),Q=Q2, radius =100, color = color. white ) cloud_3 = sphere ( pos =vec(600, cloud_height, ),q= Q3, radius =50, color = color. white ) \#List Clouds = [cloud_1, cloud_2, cloud_3] \#Calculation for loop obs_pos =vec(0,0,0) E=vec(0,0,0) for c in Clouds: r= obs_pos c.pos