Clean Volume Bars

As it says, simple clean volume indicator.
I could find what I wanted so I created this using AI.
Here is the script:
//version=5
indicator("Clean Volume Bars", shorttitle="Clean Vol", overlay=false)
vma = ta.sma(volume, 20)
col = close>open? color.new(color.green,0) : close<open? color.new(color.red,0) : color.gray
plot(volume, style=plot.style_columns, color=col, title="Volume")
plot(vma, color=color.gray, title="Vol MA 20")