Open a new Photoshop file with 1000 x 1500px. “Star environment “ Set the foreground color to white and the background color to black. Create a new layer and colored this black. Use Filter / Noise / Add Noise with amount = 70% ( Distribution = Uniform; Monochromatic = on). Apply Image / Adjust / Brightness and Contrast with Brightness = -70 and Contrast = -10. After then go to Filter / Blur / Gaus