archivo tasks.json para meter a VSCode y ejecutar Processing desde allí.

tasks.json

// Tasks for processing and p5
// only for Windows
{
    "version": "0.1.0",
    "command": "cmd",
    "isShellCommand": true,
    "showOutput": "always",
    "args": ["/C"],
    "tasks":
    [
        {
        "taskName": "1. Run processing sketch",
        "suppressTaskName": true,
        "isBuildCommand": true,
        "args":
            [
            "processing-java",
            "--force",
            "--sketch=${workspaceRoot}",
            "--output=${workspaceRoot}\\out",
            "--run"
            ]
        },
        {
        "taskName": "2. Open Processing reference",
        "suppressTaskName": true,
        "isBuildCommand": true,
        "args":
            [
            "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe",
            "file:///C:/util/processing-3/modes/java/reference/index.html"
            //"file:///C:/util/processing-3/modes/java/reference/TM_SELECTED_TEXT.html"
            ]
        },
        {
        "taskName": "3. Run p5 script",
        "suppressTaskName": true,
        "isBuildCommand": true,
        "args":
            [
            "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe",
            "index.html"
            ]
        },
        {
        "taskName": "4. Open p5 reference",
        "suppressTaskName": true,
        "isBuildCommand": true,
        "args":
            [
            "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe",
            "file:///C:/util/p5/ref/index.html"
            ]
        }
    ]
}