I'm a product design student. I'm not familiar with the terminal or writing code. Please build this for me with HTML, CSS, JavaScript and native Web Audio. Make a simple, usable browser page, with no external libraries or internet services. Sound should start only after I click. Use comfortable initial levels. I need to play with the result, not read code. Make a small synthesised musical soundscape with oscillators, no audio files. I want to compare a drone, a soft chord and a short repeating phrase. Include waveform, root pitch, tempo for the phrase, level, attack and release. Give the generated sound slow volume and filter movement and an optional simple reverb. Choose a gentle starting sound. I want to hear how a musical layer can sit underneath an environment without taking over. Add global stop.