Erosion is an exploration of compositional techniques of the 5th Century BC Greece as well as the use of changing time signature pa􀀭erns used in the 20th and 21st Century AD. The theme starts in the enharmonic genus in 3/8 time and is followed by five variations which use different ‘hues’ or shades of the chromatic and diatonic genera. The variations also use poetic feet using combinations of time cycles used in poetry in 5th Century BC. Variation Six is a summary of the previous variations with disappearing time signatures in the end. The next variation (i) is a variation upon the opening theme and six variations using the time signatures in a 20 measure structure. Each following variation has time stolen away like soil eroding from a cliff by the sea when it rains. The effect is a slow disappearing act until the final variation (viii) is only a quaver. The ending comes almost by surprise such as the final eroding of earth which vanished without being noticed.