Describe the elongation process of transcription in bacteria with diagram

dear kuldeep 
RNA polymerase use nucleotide triphosphate as substrate and polymerisation will occur according to complimentarity . 
and after the elongation process termination will start in which rho factor will attach and nascent rna will fall down and the process will be completed . 
for diagram , refer to ncert , 
ALL THE BEST 
REGARDS