Use your mouse to move these projections of the 600-cell around.
These are two different Schlegel projections. The one of the left is projected onto the icosahedron. SageMath code is below the diagrams.
These were obtained in SageMath using the following code.
show(polytopes.six_hundred_cell()
.plot(color='grey', projection_direction=[1,1,1,1], radius=0.01, frame=False),
viewer='threejs', online=True)
show(polytopes.six_hundred_cell()
.plot(color='blue', radius=0.01, frame=False),
viewer='threejs', online=True)