Line with varying colors

using Makie
 using ColorSchemes      # colormaps galore


 t = range(0, stop=1, length=500) # time steps

 θ = (6π) .* t    # angles

 x = t .* cos.(θ) # x coords of spiral
 y = t .* sin.(θ) # y coords of spiral

 p1 = lines(
     x,
     y,
     color = t,
     colormap = ColorSchemes.magma.colors,
     linewidth=8)

 cm = colorlegend(
     p1[end],             # access the plot of Scene p1
     raw = true,          # without axes or grid
     camera = campixel!,  # gives a concrete bounding box in pixels
                          # so that the `vbox` gives you the right size
     width = (            # make the colorlegend longer so it looks nicer
         30,              # the width
         540              # the height
     )
     )

 scene_final = vbox(p1, cm) # put the colorlegend and the plot together in a `vbox`