In this animation, an absolute distance has been observed within the lower velocity reference frame per the distance traveled by light within a relative time=1 e.g. lightyear. Thus, within the higher velocity reference frame traveling near .99216c the relative time from the lower velocity frame which established the absolute position of light is converted to a relative distance=1. This in turn establishes the relative time=1/8 within the higher velocity frame whereby it experiences 1/8 the time of the lower velocity frame to reach the absolute plotted position of the light from within the lower velocity frame of reference. If the higher velocity frame traveled to relative time=1, then it would have traveled eight times past the absolute position of the plotted light. Thus, the absolute light reference within the lower velocity frame only travels relative distance=1/8 of the higher velocity frame within its relative time=1, whereby light would have to be observed to travel for eight times the temporal interval to reach the absolute position of the higher velocity frame traveling relative time=1.

My interpretation of all of this is that if we observe an absolute distance established by a single light source from two opposing frames, then when observed from within a low velocity frame, the higher velocity frame has only observed it as propagating for 1/8 the temporal interval to reach an absolute position. If observed for a duration from the higher velocity frame, the lower velocity frame has observed it for eight times as long whereby establishing absolute distance and absolute time between the two opposing frames by way of the propagating light. Thus, if we wanted to know the elapsed time of a high velocity frame, we could establish an absolute temporal and spatial interval by way of the light beam, whereby during that interval we would know that the higher velocity frame had saw light to travel that distance showing only 1/8 the time, thus we know that in eight times that duration, the high velocity frame will show the same time as having elapsed whereby the light has now actually propagated eight times the absolute distance from the earlier moment we recoded its position. This gets a bit confusing, but the simplest way to imagine it is perhaps acknowledging that if we had a perfect clock which wasn't prone to dilation due to velocity fluctuations or had an internal apparatus which corrected for variances in velocity, then time becomes absolute as does distance due to us being able to establish absolute position relational to each other by way of mere velocity or absolute distance/absolute time. This also means that c is merely a speed limit for light, whereby various frames travel at various ratios of c, thus relativistic effects arise by way of our measurement of c within various frames despite the motion of the frame, but the speed of light isn't invariant within various reference frames, only the measurement thereof is due to the time dilation, length contraction and relative motion aspects which have been illustrated. An absolute time and distance measure would make the value of c within various frames to become variant, as a propagating photon is barely out running a frame traveling at .99c, yet the measurement is taking place over a longer absolute temporal and distance interval, whereby the photon appears to be covering the same distance within the same time though it is barely leading the frame.