.gr-work-grid .gr-project:nth-child(1)::after { background-image: url('assets/cambio.png'); }
.gr-work-grid .gr-project:nth-child(2)::after { background-image: url('assets/instala.png'); }
.gr-work-grid .gr-project:nth-child(3)::after { background-image: url('assets/revision.png'); }