The thesis comprises of two sections. The first section contains the idea behind the composition, the layout of the musical thoughts, and the motivic and structural analysis. The second section includes the musical score of “Mold”. “Mold” is a single-movement piece for orchestral composition. The composition relies entirely on “ mold”, deconstruct the material and the form, organize, make more possibilities in music. The thesis is centered on the investigation of personal music language against the music geometry and the acoustic orchestral space. There are five chapters for the thesis. Chapter one is the introduction. Chapter two discusses the composition incentives. Chapter three discusses the idea behind “Mold”. Introduces the ideas to the composition, the relationship between music and space, the concept of musical form and sound modeling and in space application and the instance. Chapter four introduces the technique of module in pitch and rhythm. Chapter five is the conclusion.