I followed the camera tutorial by Shaun Spalding
oCamera
create event
camera = camera_create();
var vm = matrix_build_lookat(x,y,-100,x,y,0,0,1,0);
var pm = matrix_build_projection_ortho(1366,768,2,-1000);
camera_set_view_mat(camera, vm);
camera_set_proj_mat(camera, pm);
view_camera[0] =...