Source code for the manuscript "How to modify LAMMPS from the prospective of a Particle method researcher" by Andrea Albano, Eve le Guillou, Antoine Danzé, Irene Moulitsas, Iwan H. Sahputra, Amin Rahmat, Carlos Alberto Duque-Daza, Xiaocheng Shang , Khai Ching Ng, Mostapha Ariane and Alessio Alexiadis