// program header & defines

//receive messages
    #define mes_pick_1=220;
    #define mes_pick_2 223;
    #define mes_place_1 226;
    #define mes_place_2 229;
    #define mes_null1 232
    #define mes_null2 235
    #define hello 240;        // (who are you?)
//transmit messages
//  1-40 are bricknumbers
    #define mes_done 250;
    #define mes_pick_done 238;
    #define mes_place_done 241;
    #define mes_nullz_done 244;
    #define mes_base   101
//grondplate
    #define mes_L11    104     // 1st layer parts 1st half (vert)
    #define mes_L12    107     // 1st layer parts 2nd half (vert)
    #define mes_L21    110     // 2nd layer horizontal 1st half
    #define mes_L22    113     // 2nd layer horizontal 2nd half
    #define mes_L3     116     // 3rd layer (plates) (vert)
    #define mes_roof   119     // Roof parts horizontal
    #define mes_engine 122     // engine
    #define mes_wheels 125     // wielpress
    #define mes_crane  128     // crane control
    #define mes_train  131     // train control

/*
layer  no. part             location         unit   orientation
0      1  groundplate      base              pp1

1      4  wheelbrick 2x4   front             pp2    vertical
1      5  brick 1x4        front             pp2    vertical
1      6  inv slope 2x2    front left        pp2    vertical
1      7  inv slope 2x2    front right       pp2    vertical

1      8  inv slope 2x2    rear left         pp3    vertical
1      9  inv slope 2x2    rear right        pp3    vertical
1      10 brick 1x4        mid section       pp3    vertical
1      11 wheelbrick 2x4   rear              pp3    vertical
1      12 brick 1x4        rear              pp3    vertical

1      2  inv slope 2x2    front left        pp4    horizontal (or pp1)
1      3  inv slope 2x2    front right       pp4    horizontal (or pp1)
2      13 slope 1x3        front left        pp4    horizontal
2      14 slope 1x3        front right       pp4    horizontal
2      15 brick 1x8        left              pp4    horizontal
2      16 brick 1x8        right             pp4    horizontal

2      17 slope 1x3        left              pp4    horizontal
2      18 slope 1x3        right             pp4    horizontal
2      19 inv slope 1x2    left              pp4    horizontal
2      20 inv slope ix2    right             pp4    horizontal
2      21 slope 2x2        rear              pp4    horizontal  // wissel eerst l dan R
       
3      22 plate 1x2        left              pp5    vertical
3      23 plate 1x2        right             pp5    vertical
3      24 plate 2x2        left              pp5    vertical
3      25 plate 2x2        right             pp5    vertical

3      26 plate 3x6wc      back              pp6    horizontal
4      27 screen           fron              pp6    horizontal
4      28 slope 2x4        back              pp6    horizontal
5      29 plate 4x4        top               pp6    horizontal

6      30-33 engine                          pp7    vertical
       sub assembly??
       
7      weelpress           all               pp8

*/