#define BUTTON_SIZE 60;

#define LETTER_BUTTON(letter, index, rel_to) \
part { \
	name: "button_"letter; \
	type: EXTERNAL; \
    source: "elm/button"; \
    description {  \
       state: "default" 0; \
       align: 0 0; \
       rel1 { \
          offset: (BUTTON_SIZE*index) 0; \
          to: rel_to; \
       } \
       rel2 { \
          offset: (BUTTON_SIZE*index) 0; \
          to: rel_to; \
       } \
       params { \
          string: "label" letter; \
       } \
    } \
} \

collections {
   group { name: "main";
      parts {
         part { name: "button_A";
            type: EXTERNAL;
            source: "elm/button";
            description { state: "default" 0;
               align: 0 0;
               rel1 {
                  relative: 0.5 0.5;
                  offset: (-3*BUTTON_SIZE) 0;
               }
               rel2 {
                  relative: 0.5 0.5;
                  offset: (-2*BUTTON_SIZE) BUTTON_SIZE;
               }
               params {
                  string: "label" "A";
               }
            }
         }

         LETTER_BUTTON("B", 1, "button_A");
         LETTER_BUTTON("C", 2, "button_A");
         LETTER_BUTTON("D", 3, "button_A");
         LETTER_BUTTON("E", 4, "button_A");
         LETTER_BUTTON("F", 5, "button_A");

      }
   }
}