{
  "format": "evn-blocks",
  "version": 3,
  "title": "Robot: minimal",
  "needs": "a robot: left wheel motor on port 4 (mounted mirrored), right on port 3, 62.4 mm wheels 170 mm apart, and 40 cm of clear floor ahead",
  "description": "The robot drives 30 cm forward, turns around, drives back and turns around again, so it ends where it started, facing the same way.",
  "workspace": {
    "blocks": {
      "languageVersion": 0,
      "blocks": [
        {
          "type": "evn_setup_start",
          "x": 30,
          "y": 30,
          "next": {
            "block": {
              "type": "evn_motor_setup",
              "fields": {
                "PORT": "4",
                "DIRECTION": "CCW",
                "UNIT": "DEG_S"
              },
              "next": {
                "block": {
                  "type": "evn_drivebase_setup",
                  "fields": {
                    "LEFT": "4",
                    "RIGHT": "3",
                    "WHEEL": 62.4,
                    "TRACK": 170
                  }
                }
              }
            }
          }
        },
        {
          "type": "evn_program_start",
          "x": 30,
          "y": 170,
          "next": {
            "block": {
              "type": "evn_drivebase_straight",
              "fields": {
                "THEN": "HOLD",
                "WAIT": true
              },
              "inputs": {
                "DISTANCE": {
                  "shadow": {
                    "type": "math_number",
                    "fields": {
                      "NUM": 300
                    }
                  }
                }
              },
              "next": {
                "block": {
                  "type": "evn_drivebase_turn",
                  "fields": {
                    "THEN": "HOLD",
                    "WAIT": true
                  },
                  "inputs": {
                    "ANGLE": {
                      "shadow": {
                        "type": "math_number",
                        "fields": {
                          "NUM": 180
                        }
                      }
                    }
                  },
                  "next": {
                    "block": {
                      "type": "evn_drivebase_straight",
                      "fields": {
                        "THEN": "HOLD",
                        "WAIT": true
                      },
                      "inputs": {
                        "DISTANCE": {
                          "shadow": {
                            "type": "math_number",
                            "fields": {
                              "NUM": 300
                            }
                          }
                        }
                      },
                      "next": {
                        "block": {
                          "type": "evn_drivebase_turn",
                          "fields": {
                            "THEN": "HOLD",
                            "WAIT": true
                          },
                          "inputs": {
                            "ANGLE": {
                              "shadow": {
                                "type": "math_number",
                                "fields": {
                                  "NUM": 180
                                }
                              }
                            }
                          },
                          "next": {
                            "block": {
                              "type": "text_print",
                              "inputs": {
                                "TEXT": {
                                  "block": {
                                    "type": "text_join",
                                    "inputs": {
                                      "ADD0": {
                                        "shadow": {
                                          "type": "text",
                                          "fields": {
                                            "TEXT": "degrees turned: "
                                          }
                                        }
                                      },
                                      "ADD1": {
                                        "block": {
                                          "type": "evn_drivebase_measure",
                                          "fields": {
                                            "WHAT": "angle"
                                          }
                                        }
                                      }
                                    }
                                  }
                                }
                              },
                              "next": {
                                "block": {
                                  "type": "evn_drivebase_stop",
                                  "fields": {
                                    "ACTION": "stop"
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    }
  }
}