16 png files each saved in green and grey colors - size will fit 8,5x11 inch and A4 paper format, transparent background. 1 eps vector file. 1 pdf file.
You can use free Inkscape program to open / edit pdf files and to create invitation, logos, banners etc. Please, watch this video https://www.youtube.com/watch?v=87zBMDxZX3k to learn how to save your work.