Make a powerpoint deck with two slides using officegen. Text on top of background image.

make-deck.coffee

fs = require('fs')
path = require('path')
officegen = require('officegen')

pptx = officegen ('pptx')

slide = pptx.makeNewSlide()

slide.addImage( path.resolve(__dirname, 'mk.jpg' ), { y: 0, x: 0,cy: '100%', cx: '100%'  } )

# Basic way to add text string
slide.addText 'This is a test'
slide.addText 'Fast position', 0, 20
slide.addText 'Full line', 0, 40, '100%', 20

# Add text box with multi colors and fonts:
slide.addText([
    { text: 'Hello ', options: { font_size: 56 } }
    { text: 'World!', options: { font_size: 56, font_face: 'Arial', color: 'ffff00' } }
  ]
, { cx: '75%', cy: 66, y: 150 } )

slide.addText( 'Office generator', {
  y: 66, x: 'c', cx: '50%', cy: 60, font_size: 48, 
  color: '0000ff' 
})

slide = pptx.makeNewSlide()

slide.addImage( path.resolve(__dirname, 'at.jpg' ), { y: 0, x: 0,cy: '100%', cx: '100%'  } )

slide.addText( 'Boom!!!', {
  y: 250, x: 10, cx: '70%', 
  font_face: 'Wide Latin', font_size: 54, 
  color: 'cc0000', bold: true, underline: true 
})


out = fs.createWriteStream 'node-generated.pptx'

out.on 'error', -> console.log arguments

pptx.generate ( out );

BTW I stole most of this from here: https://github.com/Ziv-Barber/officegen/blob/master/examples/make_pptx.js