ical ▁of ▁these ▁later ▁colour ful ▁works ▁is ▁Sh adow ▁Play . ▁ ▁Some ▁works ▁are ▁titled ▁after ▁particular ▁dates , ▁others ▁after ▁specific ▁locations ▁( for ▁instance , ▁Les ▁Bass acs , ▁the ▁village ▁near ▁Saint - S at urn in - lès - A pt ▁in ▁the ▁south ▁of ▁France ▁where ▁R iley ▁has ▁a ▁studio ). ▁ ▁Following ▁a ▁visit ▁to ▁Egypt ▁in ▁ 1 9 8 0 – 8 1 , ▁R iley ▁created ▁colours ▁in ▁what ▁she ▁called ▁her ▁' E gypt ian ▁p alette ' ▁and ▁produced ▁works ▁such ▁as ▁the ▁Ka ▁and ▁Ra ▁series , ▁which ▁capture ▁the ▁spirit ▁of ▁the ▁country , ▁ancient ▁and ▁modern , ▁and ▁reflect ▁the ▁colours ▁of ▁the ▁Egypt ian ▁landscape . ▁Inv oking ▁the ▁sens orial ▁memory ▁of ▁her ▁travel s , ▁the ▁paint ings ▁produced ▁between ▁ 1 9 8 0 ▁and ▁ 1 9 8 5 ▁exhib it ▁R iley ' s ▁free ▁reconst ruction ▁of ▁the ▁restricted ▁chrom atic ▁p alette ▁discovered ▁abroad . ▁In ▁ 1 9 8 3 , ▁for ▁the ▁first ▁time ▁in ▁fifteen ▁years , ▁R iley ▁returned ▁to ▁Ven ice ▁to ▁once ▁again ▁study ▁the ▁paint ings ▁that ▁form ▁the ▁basis ▁of ▁European ▁colour ism . ▁Tow ards ▁the ▁end ▁of ▁the ▁ 1 9 8 0 s , ▁R iley ' s ▁work ▁under w ent ▁a ▁dram atic ▁change ▁with ▁the ▁re int roduction ▁of ▁the ▁diagonal ▁in ▁the ▁form ▁of ▁a ▁sequence ▁of ▁par alle lo gram s ▁used