Pie charts are terrible
Pie charts are notoriously terrible for data visualization. Humans are genuinely bad at comparing angles. Thus, the only reason one should ever use a pie chart is to make beautiful pie-chart-art.
par(mar = c(0, 1, 0, 1)) pie( c(280, 60, 20), c('Sky', 'Sunny side of pyramid', 'Shady side of pyramid'), col = c('#0292D8', '#F7EA39', '#C4B632'), init.angle = -50, border = NA )