thank you,  i agree on an high level aspect, based on your examples.  complimenting each other, by working together, passing around good and bad.  Ripple effects/ bullwhipping ect....  However, by saving the world, we need to ensure that in fact we are considering the entire world.  Many under-developed countries are greatly affected by 1st world countries economic and business decisions, and typically not in a positive way.  Although we bring jobs/opportunity for people, are we doing it with their best interest in mind, the environments, or ours?  What are we leaving behind for their next generation?  

Cheers
I test some larger m and kand can draw them successfully. Thank you so much for your patiently help. 

Best Wishes
Chen