{
"id": "p07_collatz_steps",
"entry": "frame",
"needs_state": false,
"checks": [
{
"kind": "pixel_at",
"frame": 0,
"x": 200,
"y": 120,
"expect_rgb": [0, 111, 0],
"rationale": "collatz_steps(27) == 111; clear to 111*256 == 0x006F00 -> green channel 111. (Pick a corner away from the drawn number.)"
}
]
}