a density ratio setting module that sets the ratio of the density of the first chromatic color dots to {TAIL ~ the density} of {HEAD ~ the second chromatic color dots}, 
a density ratio setting module that sets the ratio of the density of the first chromatic color dots to { TAIL ~ the density } of { HEAD ~ the second chromatic color dots } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH